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portada Spinors in Hilbert Space
Type
Physical Book
Author
Publisher
Language
English
Pages
91
Format
Paperback
Dimensions
22.9x15.2x0.5 cm
Weight
0.15 kg.
ISBN13
9781475700367
Categories

Spinors in Hilbert Space

Paul Dirac (Author) · Springer · Paperback

Spinors in Hilbert Space - Dirac, Paul

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Synopsis "Spinors in Hilbert Space"

1. Hilbert Space The words "Hilbert space" here will always denote what math- ematicians call a separable Hilbert space. It is composed of vectors each with a denumerable infinity of coordinates ql' q2' Q3, .... Usually the coordinates are considered to be complex numbers and each vector has a squared length rIQrI2. This squared length must converge in order that the q's may specify a Hilbert vector. Let us express qr in terms of real and imaginary parts, qr = Xr + iYr' Then the squared length is l: .r(x; + y;). The x's and y's may be looked upon as the coordinates of a vector. It is again a Hilbert vector, but it is a real Hilbert vector, with only real coordinates. Thus a complex Hilbert vector uniquely determines a real Hilbert vector. The second vector has, at first sight, twice as many coordinates as the first one. But twice a denumerable in- finity is again a denumerable infinity, so the second vector has the same number of coordinates as the first. Thus a complex Hilbert vector is not a more general kind of quantity than a real one.

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