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"quote": "\n\n> [!definition] 定义（闵可夫斯基空间傅里叶变换）\n> 闵可夫斯基空间上函数 $f$ 的[傅里叶变换(Fourier transform)](../../../../../concepts/analysis/minkowski-space-fourier-transform)由下式给出\n>\n> $$\n> \\begin{aligned}\n> \\widetilde {f} (p) &= \\frac {1}{(2 \\pi) ^ {2}} \\int_ {M ^ {4}} e ^ {- i p \\cdot x} f (x) d ^ {4} x \\\\[0.45em]\n> &= \\frac {1}{(2 \\pi) ^ {2}} \\int_ {M ^ {4}} e ^ {- i (- p _ {0} x _ {0} + p _ {1} x _ {1} + p _ {2} x _ {2} + p _ {3} x _ {3})} f (x) d x _ {0} d ^ {3} \\mathbf {x}\n> \\end{aligned}\n> $$\n",
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