Chumakov, S. M.; Hellwig, K.-E.; Klimov, A. B. Developing entropy of open finite-level systems. (English) Zbl 1116.82302 Int. J. Theor. Phys. 38, No. 12, 3221-3229 (1999). MSC: 82B10 47N50 81V80 PDFBibTeX XMLCite \textit{S. M. Chumakov} et al., Int. J. Theor. Phys. 38, No. 12, 3221--3229 (1999; Zbl 1116.82302) Full Text: DOI
Chumakov, S. M.; Hellwig, K.-E.; Klimov, A. B. The entropy of open finite-level systems. (English) Zbl 0907.15020 Int. J. Theor. Phys. 37, No. 1, 471-479 (1998). Reviewer: M.Shapiro (México) MSC: 15A90 28D20 81P99 PDFBibTeX XMLCite \textit{S. M. Chumakov} et al., Int. J. Theor. Phys. 37, No. 1, 471--479 (1998; Zbl 0907.15020) Full Text: DOI
Hellwig, Karl-Eberhard (ed.); Keyl, Michael (ed.); Stulpe, Werner (ed.); Trucks, Mathias (ed.) Special issue: Proceedings of the International Quantum Structures Association 1996. Berlin, Germany, July 29 - August 3, 1996. (English) Zbl 0905.00080 Int. J. Theor. Phys. 37, No. 1, 628 p. (1998). MSC: 00B25 81-06 PDFBibTeX XML
Hellwig, K.-E. General scheme of measurement processes. (English) Zbl 0850.81015 Int. J. Theor. Phys. 34, No. 8, 1467-1479 (1995). MSC: 81P15 PDFBibTeX XMLCite \textit{K. E. Hellwig}, Int. J. Theor. Phys. 34, No. 8, 1467--1479 (1995; Zbl 0850.81015) Full Text: DOI
Busch, P.; Hellwig, K.-E.; Stulpe, W. On classical representations of finite-dimensional quantum mechanics. (English) Zbl 0813.60004 Int. J. Theor. Phys. 32, No. 3, 399-405 (1993). MSC: 60A99 81P10 PDFBibTeX XMLCite \textit{P. Busch} et al., Int. J. Theor. Phys. 32, No. 3, 399--405 (1993; Zbl 0813.60004) Full Text: DOI
Hellwig, K.-E.; Krausser, D. Erratum to “Propositional systems and measurements. II”. (English) Zbl 0404.03058 Int. J. Theor. Phys. 17, 81 (1978). MSC: 03G12 81P10 06C15 PDFBibTeX XMLCite \textit{K. E. Hellwig} and \textit{D. Krausser}, Int. J. Theor. Phys. 17, 81 (1978; Zbl 0404.03058) Full Text: DOI
Hellwig, K.-E.; Krausser, D. Propositional systems and measurements. III: Quasitensorproducts of certain orthomodular lattices. (English) Zbl 0404.03059 Int. J. Theor. Phys. 16, 775-793 (1977). MSC: 03G12 81P10 06C15 PDFBibTeX XMLCite \textit{K. E. Hellwig} and \textit{D. Krausser}, Int. J. Theor. Phys. 16, 775--793 (1977; Zbl 0404.03059) Full Text: DOI
Hellwig, K.-E.; Krausser, D. Propositional systems and measurements. II. (English) Zbl 0404.03057 Int. J. Theor. Phys. 10, 261-272 (1974). MSC: 03G12 81P10 06C15 PDFBibTeX XMLCite \textit{K. E. Hellwig} and \textit{D. Krausser}, Int. J. Theor. Phys. 10, 261--272 (1974; Zbl 0404.03057) Full Text: DOI
Hellwig, K.-E.; Krausser, D. Propositional systems and measurements. I. (English) Zbl 0404.03056 Int. J. Theor. Phys. 9, 277-289 (1974). MSC: 03G12 81P10 06C15 PDFBibTeX XMLCite \textit{K. E. Hellwig} and \textit{D. Krausser}, Int. J. Theor. Phys. 9, 277--289 (1974; Zbl 0404.03056) Full Text: DOI