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Time ordering theorem and calculational recipes for thermo field dynamics

โœ Scribed by H. Chu; H. Umezawa


Book ID
103785436
Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
708 KB
Volume
177
Category
Article
ISSN
0375-9601

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a b s t r a c t Let T be a time scale (i.e., a closed nonempty subset of R) with sup T = +โˆž. Consider the second-order half-linear dynamic equation where r(t) > 0, p(t) are continuous, In particular, no explicit sign assumptions are made with respect to the coefficient p(t). We give conditions und