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。
Szekeres · source-snapshot-bc3404156f6e
已登记出处中的最早位置:§14.1 · zh-CN。
来源短摘录与定位
§14.1 · zh-CN · translation · unreviewed
在本章中,我们将采用狄拉克的左矢(bra)-右矢记号,这种记号虽然略显奇特,但已在物理学家中大体上成为首选约定。向量写作右矢(ket) ,并作出等同。根据里斯表示定理13.10,对每个线性泛函,存在唯一向量使得。在狄拉克的术语中,该线性泛函被称为左矢,写作。左矢与右矢之间的关系是反线性的,
§14.1 · en · original_transcription · unreviewed
In this chapter we will adopt Dirac’s bra-ket notation which, though slightly quirky, has largely become the convention of choice among physicists. Vectors are written as kets and one makes the identification . By the Riesz representation theorem 13.10, to each linear functional there corresponds a unique vector such that . In Dirac’s terminology the linear functional is referred to as a bra, written . The relation between bras and kets is antilinear,