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    <loc>https://limbo137.top/en/chapter-01/04-mappings</loc>
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    <loc>https://limbo137.top/en/chapter-01/05-infinite-sets</loc>
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    <loc>https://limbo137.top/en/chapter-01/07-category-theory</loc>
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    <loc>https://limbo137.top/en/chapter-01/</loc>
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    <loc>https://limbo137.top/en/chapter-02/01-elements-of-group-theory</loc>
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    <loc>https://limbo137.top/en/chapter-02/02-transformation-and-permutation-groups</loc>
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    <loc>https://limbo137.top/en/chapter-02/03-matrix-groups</loc>
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    <loc>https://limbo137.top/en/chapter-02/04-homomorphisms-and-isomorphisms</loc>
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    <loc>https://limbo137.top/en/chapter-02/05-normal-subgroups-and-factor-groups</loc>
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    <loc>https://limbo137.top/en/chapter-02/06-group-actions</loc>
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    <loc>https://limbo137.top/en/chapter-02/07-symmetry-groups</loc>
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    <loc>https://limbo137.top/en/chapter-02/</loc>
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    <loc>https://limbo137.top/en/chapter-03/01-rings-and-fields</loc>
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    <loc>https://limbo137.top/en/chapter-03/02-vector-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-03/03-vector-space-homomorphisms</loc>
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    <loc>https://limbo137.top/en/chapter-03/04-vector-subspaces-and-quotient-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-03/05-bases-of-a-vector-space</loc>
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    <loc>https://limbo137.top/en/chapter-03/06-summation-convention-and-transformation-of-bases</loc>
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    <loc>https://limbo137.top/en/chapter-03/07-dual-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-03/</loc>
    <lastmod>2026-10-07T21:35:16.022Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-04/01-eigenspaces-and-characteristic-equations</loc>
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    <loc>https://limbo137.top/en/chapter-04/02-jordan-canonical-form</loc>
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    <loc>https://limbo137.top/en/chapter-04/03-linear-ordinary-differential-equations</loc>
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    <loc>https://limbo137.top/en/chapter-04/04-introduction-to-group-representation-theory</loc>
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    <loc>https://limbo137.top/en/chapter-04/</loc>
    <lastmod>2026-10-07T21:35:16.022Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-05/01-real-inner-product-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-05/02-complex-inner-product-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-05/03-representations-of-finite-groups</loc>
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    <loc>https://limbo137.top/en/chapter-05/</loc>
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    <loc>https://limbo137.top/en/chapter-06/01-algebras-and-ideals</loc>
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    <loc>https://limbo137.top/en/chapter-06/02-complex-numbers-and-complex-structures</loc>
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    <loc>https://limbo137.top/en/chapter-06/03-quaternions-and-clifford-algebras</loc>
    <lastmod>2026-10-07T21:35:16.023Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-06/04-grassmann-algebras</loc>
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    <loc>https://limbo137.top/en/chapter-06/05-lie-algebras-and-lie-groups</loc>
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    <loc>https://limbo137.top/en/chapter-06/</loc>
    <lastmod>2026-10-07T21:35:16.023Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-07/01-free-vector-spaces-and-tensor-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-07/02-multilinear-maps-and-tensors</loc>
    <lastmod>2026-10-07T21:35:16.023Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-07/03-basis-representation-of-tensors</loc>
    <lastmod>2026-10-07T21:35:16.023Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-07/04-operations-on-tensors</loc>
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    <loc>https://limbo137.top/en/chapter-07/</loc>
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    <loc>https://limbo137.top/en/chapter-08/01-r-vectors-and-r-forms</loc>
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    <loc>https://limbo137.top/en/chapter-08/02-basis-representation-of-r-vectors</loc>
    <lastmod>2026-10-07T21:35:16.024Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-08/03-exterior-product</loc>
    <lastmod>2026-10-07T21:35:16.024Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-08/04-interior-product</loc>
    <lastmod>2026-10-07T21:35:16.024Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-08/05-oriented-vector-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-08/06-the-hodge-dual</loc>
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    <loc>https://limbo137.top/en/chapter-08/</loc>
    <lastmod>2026-10-07T21:35:16.024Z</lastmod>
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    <loc>https://limbo137.top/en/chapter-09/01-minkowski-space-time</loc>
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    <loc>https://limbo137.top/en/chapter-09/02-relativistic-kinematics</loc>
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    <loc>https://limbo137.top/en/chapter-09/03-particle-dynamics</loc>
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    <loc>https://limbo137.top/en/chapter-09/04-electrodynamics</loc>
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    <loc>https://limbo137.top/en/chapter-09/05-conservation-laws-and-energy-stress-tensors</loc>
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    <loc>https://limbo137.top/en/chapter-09/</loc>
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    <loc>https://limbo137.top/en/chapter-10/01-euclidean-topology</loc>
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    <loc>https://limbo137.top/en/chapter-10/02-general-topological-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-10/03-metric-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-10/04-induced-topologies</loc>
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    <loc>https://limbo137.top/en/chapter-10/05-hausdorff-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-10/06-compact-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-10/07-connected-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-10/08-topological-groups</loc>
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    <loc>https://limbo137.top/en/chapter-10/09-topological-vector-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-10/</loc>
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    <loc>https://limbo137.top/en/chapter-11/01-measurable-spaces-and-functions</loc>
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  </url><url>
    <loc>https://limbo137.top/en/chapter-11/02-measure-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-11/03-lebesgue-integration</loc>
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    <loc>https://limbo137.top/en/chapter-11/</loc>
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    <loc>https://limbo137.top/en/chapter-12/01-test-functions-and-distributions</loc>
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    <loc>https://limbo137.top/en/chapter-12/02-operations-on-distributions</loc>
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    <loc>https://limbo137.top/en/chapter-12/03-fourier-transforms</loc>
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    <loc>https://limbo137.top/en/chapter-12/04-green-s-functions</loc>
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    <loc>https://limbo137.top/en/chapter-12/</loc>
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    <loc>https://limbo137.top/en/chapter-13/01-definitions-and-examples</loc>
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  </url><url>
    <loc>https://limbo137.top/en/chapter-13/02-expansion-theorems</loc>
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    <loc>https://limbo137.top/en/chapter-13/03-linear-functionals</loc>
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    <loc>https://limbo137.top/en/chapter-13/04-bounded-linear-operators</loc>
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    <loc>https://limbo137.top/en/chapter-13/05-spectral-theory</loc>
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    <loc>https://limbo137.top/en/chapter-13/06-unbounded-operators</loc>
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    <loc>https://limbo137.top/en/chapter-13/</loc>
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    <loc>https://limbo137.top/en/chapter-14/01-basic-concepts</loc>
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    <loc>https://limbo137.top/en/chapter-14/02-quantum-dynamics</loc>
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    <loc>https://limbo137.top/en/chapter-14/03-symmetry-transformations</loc>
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    <loc>https://limbo137.top/en/chapter-14/04-quantum-statistical-mechanics</loc>
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    <loc>https://limbo137.top/en/chapter-14/</loc>
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    <loc>https://limbo137.top/en/chapter-15/01-differentiable-manifolds</loc>
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    <loc>https://limbo137.top/en/chapter-15/02-differentiable-maps-and-curves</loc>
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    <loc>https://limbo137.top/en/chapter-15/03-tangent-cotangent-and-tensor-spaces</loc>
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    <loc>https://limbo137.top/en/chapter-15/04-tangent-map-and-submanifolds</loc>
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    <loc>https://limbo137.top/en/chapter-15/05-commutators-flows-and-lie-derivatives</loc>
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    <loc>https://limbo137.top/en/chapter-15/06-distributions-and-frobenius-theorem</loc>
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    <loc>https://limbo137.top/en/chapter-15/</loc>
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    <loc>https://limbo137.top/en/chapter-16/01-differential-forms-and-exterior-derivative</loc>
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    <loc>https://limbo137.top/en/chapter-16/02-properties-of-exterior-derivative</loc>
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    <loc>https://limbo137.top/en/chapter-16/03-frobenius-theorem-dual-form</loc>
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    <loc>https://limbo137.top/en/chapter-16/04-thermodynamics</loc>
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    <loc>https://limbo137.top/en/chapter-16/05-classical-mechanics</loc>
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    <loc>https://limbo137.top/en/chapter-16/</loc>
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    <loc>https://limbo137.top/en/chapter-17/01-partitions-of-unity</loc>
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    <loc>https://limbo137.top/en/chapter-17/02-integration-of-n-forms</loc>
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    <loc>https://limbo137.top/en/chapter-17/03-stokes-theorem</loc>
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    <loc>https://limbo137.top/en/chapter-17/04-homology-and-cohomology</loc>
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    <loc>https://limbo137.top/en/chapter-17/05-the-poincar-e-lemma</loc>
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    <loc>https://limbo137.top/en/chapter-17/</loc>
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    <loc>https://limbo137.top/en/chapter-18/01-linear-connections-and-geodesics</loc>
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    <loc>https://limbo137.top/en/chapter-18/02-covariant-derivative-of-tensor-fields</loc>
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    <loc>https://limbo137.top/en/chapter-18/03-curvature-and-torsion</loc>
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    <loc>https://limbo137.top/en/chapter-18/04-pseudo-riemannian-manifolds</loc>
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    <loc>https://limbo137.top/en/chapter-18/05-equation-of-geodesic-deviation</loc>
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    <loc>https://limbo137.top/en/chapter-18/06-the-riemann-tensor-and-its-symmetries</loc>
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    <loc>https://limbo137.top/en/chapter-18/07-cartan-formalism</loc>
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    <loc>https://limbo137.top/en/chapter-18/08-general-relativity</loc>
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    <loc>https://limbo137.top/en/chapter-18/09-cosmology</loc>
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    <loc>https://limbo137.top/en/chapter-18/10-variation-principles-in-space-time</loc>
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    <loc>https://limbo137.top/en/chapter-18/</loc>
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    <loc>https://limbo137.top/en/chapter-19/01-lie-groups</loc>
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    <loc>https://limbo137.top/en/chapter-19/02-the-exponential-map</loc>
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    <loc>https://limbo137.top/en/chapter-19/03-lie-subgroups</loc>
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    <loc>https://limbo137.top/en/chapter-19/04-lie-groups-of-transformations</loc>
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    <loc>https://limbo137.top/en/chapter-19/05-groups-of-isometries</loc>
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    <loc>https://limbo137.top/en/chapter-19/</loc>
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    <loc>https://limbo137.top/zh/chapter-01/03-products-and-relations</loc>
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    <loc>https://limbo137.top/zh/chapter-01/04-mappings</loc>
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    <loc>https://limbo137.top/zh/chapter-01/05-infinite-sets</loc>
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    <loc>https://limbo137.top/zh/chapter-01/06-structures</loc>
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    <loc>https://limbo137.top/zh/chapter-01/07-category-theory</loc>
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    <loc>https://limbo137.top/zh/chapter-01/</loc>
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    <loc>https://limbo137.top/zh/chapter-02/01-elements-of-group-theory</loc>
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    <loc>https://limbo137.top/zh/chapter-02/02-transformation-and-permutation-groups</loc>
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    <loc>https://limbo137.top/zh/chapter-02/03-matrix-groups</loc>
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    <loc>https://limbo137.top/zh/chapter-02/04-homomorphisms-and-isomorphisms</loc>
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    <loc>https://limbo137.top/zh/chapter-02/05-normal-subgroups-and-factor-groups</loc>
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    <loc>https://limbo137.top/zh/chapter-02/06-group-actions</loc>
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    <loc>https://limbo137.top/zh/chapter-02/07-symmetry-groups</loc>
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    <loc>https://limbo137.top/zh/chapter-02/</loc>
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    <loc>https://limbo137.top/zh/chapter-03/01-rings-and-fields</loc>
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    <loc>https://limbo137.top/zh/chapter-03/02-vector-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-03/03-vector-space-homomorphisms</loc>
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    <loc>https://limbo137.top/zh/chapter-03/04-vector-subspaces-and-quotient-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-03/05-bases-of-a-vector-space</loc>
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    <loc>https://limbo137.top/zh/chapter-03/06-summation-convention-and-transformation-of-bases</loc>
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    <loc>https://limbo137.top/zh/chapter-03/07-dual-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-03/</loc>
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    <loc>https://limbo137.top/zh/chapter-04/01-eigenspaces-and-characteristic-equations</loc>
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    <loc>https://limbo137.top/zh/chapter-04/02-jordan-canonical-form</loc>
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    <loc>https://limbo137.top/zh/chapter-04/03-linear-ordinary-differential-equations</loc>
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    <loc>https://limbo137.top/zh/chapter-04/04-introduction-to-group-representation-theory</loc>
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    <loc>https://limbo137.top/zh/chapter-04/</loc>
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    <loc>https://limbo137.top/zh/chapter-05/01-real-inner-product-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-05/02-complex-inner-product-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-05/03-representations-of-finite-groups</loc>
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    <loc>https://limbo137.top/zh/chapter-06/01-algebras-and-ideals</loc>
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    <loc>https://limbo137.top/zh/chapter-06/02-complex-numbers-and-complex-structures</loc>
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    <loc>https://limbo137.top/zh/chapter-06/03-quaternions-and-clifford-algebras</loc>
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    <loc>https://limbo137.top/zh/chapter-06/04-grassmann-algebras</loc>
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    <loc>https://limbo137.top/zh/chapter-06/05-lie-algebras-and-lie-groups</loc>
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    <loc>https://limbo137.top/zh/chapter-06/</loc>
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    <loc>https://limbo137.top/zh/chapter-07/01-free-vector-spaces-and-tensor-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-07/02-multilinear-maps-and-tensors</loc>
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    <loc>https://limbo137.top/zh/chapter-07/03-basis-representation-of-tensors</loc>
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    <loc>https://limbo137.top/zh/chapter-07/04-operations-on-tensors</loc>
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    <loc>https://limbo137.top/zh/chapter-07/</loc>
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    <loc>https://limbo137.top/zh/chapter-08/01-r-vectors-and-r-forms</loc>
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    <loc>https://limbo137.top/zh/chapter-08/02-basis-representation-of-r-vectors</loc>
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    <loc>https://limbo137.top/zh/chapter-08/03-exterior-product</loc>
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    <loc>https://limbo137.top/zh/chapter-08/04-interior-product</loc>
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    <loc>https://limbo137.top/zh/chapter-08/05-oriented-vector-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-08/06-the-hodge-dual</loc>
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    <loc>https://limbo137.top/zh/chapter-08/</loc>
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    <loc>https://limbo137.top/zh/chapter-09/01-minkowski-space-time</loc>
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    <loc>https://limbo137.top/zh/chapter-09/02-relativistic-kinematics</loc>
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    <loc>https://limbo137.top/zh/chapter-09/03-particle-dynamics</loc>
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    <loc>https://limbo137.top/zh/chapter-09/04-electrodynamics</loc>
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    <loc>https://limbo137.top/zh/chapter-09/05-conservation-laws-and-energy-stress-tensors</loc>
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    <loc>https://limbo137.top/zh/chapter-09/</loc>
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    <loc>https://limbo137.top/zh/chapter-10/01-euclidean-topology</loc>
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    <loc>https://limbo137.top/zh/chapter-10/02-general-topological-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-10/03-metric-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-10/04-induced-topologies</loc>
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    <loc>https://limbo137.top/zh/chapter-10/05-hausdorff-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-10/06-compact-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-10/07-connected-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-10/08-topological-groups</loc>
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    <loc>https://limbo137.top/zh/chapter-10/09-topological-vector-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-10/</loc>
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    <loc>https://limbo137.top/zh/chapter-11/01-measurable-spaces-and-functions</loc>
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    <loc>https://limbo137.top/zh/chapter-11/02-measure-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-11/03-lebesgue-integration</loc>
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    <loc>https://limbo137.top/zh/chapter-11/</loc>
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    <loc>https://limbo137.top/zh/chapter-12/01-test-functions-and-distributions</loc>
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    <loc>https://limbo137.top/zh/chapter-12/02-operations-on-distributions</loc>
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    <loc>https://limbo137.top/zh/chapter-12/03-fourier-transforms</loc>
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    <loc>https://limbo137.top/zh/chapter-12/04-green-s-functions</loc>
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    <loc>https://limbo137.top/zh/chapter-12/</loc>
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    <loc>https://limbo137.top/zh/chapter-13/01-definitions-and-examples</loc>
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    <loc>https://limbo137.top/zh/chapter-13/02-expansion-theorems</loc>
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    <loc>https://limbo137.top/zh/chapter-13/03-linear-functionals</loc>
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    <loc>https://limbo137.top/zh/chapter-13/05-spectral-theory</loc>
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    <loc>https://limbo137.top/zh/chapter-13/</loc>
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    <loc>https://limbo137.top/zh/chapter-14/01-basic-concepts</loc>
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    <loc>https://limbo137.top/zh/chapter-14/02-quantum-dynamics</loc>
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    <loc>https://limbo137.top/zh/chapter-14/03-symmetry-transformations</loc>
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    <loc>https://limbo137.top/zh/chapter-14/04-quantum-statistical-mechanics</loc>
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    <loc>https://limbo137.top/zh/chapter-14/</loc>
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    <loc>https://limbo137.top/zh/chapter-15/01-differentiable-manifolds</loc>
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    <loc>https://limbo137.top/zh/chapter-15/02-differentiable-maps-and-curves</loc>
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    <loc>https://limbo137.top/zh/chapter-15/03-tangent-cotangent-and-tensor-spaces</loc>
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    <loc>https://limbo137.top/zh/chapter-15/04-tangent-map-and-submanifolds</loc>
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    <loc>https://limbo137.top/zh/chapter-15/05-commutators-flows-and-lie-derivatives</loc>
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    <loc>https://limbo137.top/zh/chapter-15/06-distributions-and-frobenius-theorem</loc>
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    <loc>https://limbo137.top/zh/chapter-16/01-differential-forms-and-exterior-derivative</loc>
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    <loc>https://limbo137.top/zh/chapter-16/04-thermodynamics</loc>
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    <loc>https://limbo137.top/zh/chapter-16/05-classical-mechanics</loc>
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    <loc>https://limbo137.top/zh/chapter-17/01-partitions-of-unity</loc>
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    <loc>https://limbo137.top/zh/chapter-17/02-integration-of-n-forms</loc>
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    <loc>https://limbo137.top/zh/chapter-18/02-covariant-derivative-of-tensor-fields</loc>
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    <loc>https://limbo137.top/zh/chapter-18/07-cartan-formalism</loc>
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    <loc>https://limbo137.top/zh/chapter-19/02-the-exponential-map</loc>
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    <loc>https://limbo137.top/zh/chapter-19/03-lie-subgroups</loc>
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    <loc>https://limbo137.top/zh/chapter-19/05-groups-of-isometries</loc>
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