Unitary colligations and parametrization formulas
نویسندگان
چکیده
منابع مشابه
Characteristic Functions of Unitary Colligations
Let 5 and 8 be Krein spaces. By S(3 ,8 ) we denote the (generalized Schur) class of all functions O, defined and holomorphic at z = 0 and with values in L(5,8), the space of bounded Linear operators from 5 to 8 (we write L ( 8 ) for L(3,S)). It is known, see Section 3 below, that any OeS(3,8) is in some neighborhood of z = 0 the characteristic function On of a unitary colligation A = (J?,S,@;U)...
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We examine the calculation of the critical temperature T c for the restoration of a spontaneously broken symmetry. Motivated by a set of recently developed gauge dependence identities, we give a gauge and parameterization independent definition of this temperature in terms of the physical mass of the scalar particle as determined by the propagator pole. As an explicit illustration, we consider ...
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ژورنال
عنوان ژورنال: Ukrainian Mathematical Journal
سال: 1994
ISSN: 0041-5995,1573-9376
DOI: 10.1007/bf01062232