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$$J$$-expanding matrix-valued functions, and their role in the analytic theory of electrical circuits. ($$J$$-dehnende Matrixfunktionen und ihre Rolle in der analytischen Theorie der elektrischen Netzwerke.) (Russian) Zbl 0268.94009

##### MSC:
 94C10 Switching theory, application of Boolean algebra; Boolean functions (MSC2010) 47B50 Linear operators on spaces with an indefinite metric 30G30 Other generalizations of analytic functions (including abstract-valued functions)