§5.4 and §16.1: property of a representation, distinct from one unitary operator.
别名:unitary
按作者与版本查阅
以下按已登记位置排列。出现顺序、原文引用与已登记依赖分别展示;最早位置不代表全书首次定义。
Woit · 2025-10-20
已登记出处中的最早位置:§5.4 · en。
来源短摘录与定位
§5.4 · en · original_transcription · ai-transcription-compared
正文请在原位置阅读;长段落、数学边界或未定位引用不截断嵌入,精确范围与指纹保存在结构化索引。
§16.1 · en · machine_draft · machine-draft-not-reviewed
The group is noncompact, and its representation theory differs greatly from that of . In particular, every nontrivial irreducible representation that is unitary is infinite-dimensional. This is an important topic in mathematics, but beyond our scope. We will study one such representation, arising from the quantum-mechanical state space; it is a representation of a double cover of , not of itself.