Cohomología 2-dimensional con coeficientes en grupos categoría.
P. Carrasco, J. Martínez Moreno (1997)
Extracta Mathematicae
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P. Carrasco, J. Martínez Moreno (1997)
Extracta Mathematicae
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Néstor G. Martínez, Hilary A. Priestley (1995)
Mathware and Soft Computing
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It is shown that the implication of an MV-algebra is determined by de Morgan negation operations on a family of quotients of the given algebra; these quotients may be taken to be totally ordered. Certain existing results on the uniqueness of an MV-algebra implication are thereby elucidated and new criteria for uniqueness derived. These rely on a characterisation of chains on which a de Morgan negation is necessarily unique.
Porst, H.-E.
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Lev Birbrair, Alexandre C. G. Fernandes (2000)
Revista Matemática Complutense
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We present a complete bi-Lipschitz classification of germs of semialgebraic curves (semialgebraic sets of the dimension one). For this purpose we introduce the so-called Hölder Semicomplex, a bi-Lipschitz invariant. Hölder Semicomplex is the collection of all first exponents of Newton-Puiseux expansions, for all pairs of branches of a curve. We prove that two germs of curves are bi-Lipschitz equivalent if and only if the corresponding Hölder Semicomplexes are isomorphic. We also prove...
Peter G. Casazza, Ole Christensen, Nigel J. Kalton (2001)
Collectanea Mathematica
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Močkoř, J.
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Nedoma, J.
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Riečan, B.
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M. B. S. Laporta (1999)
Disertaciones Matemáticas del Seminario de Matemáticas Fundamentales
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Palaniappan Kannappan (1995)
Mathware and Soft Computing
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Among normal linear spaces, the inner product spaces (i.p.s.) are particularly interesting. Many characterizations of i.p.s. among linear spaces are known using various functional equations. Three functional equations characterizations of i.p.s. are based on the Frchet condition, the Jordan and von Neumann identity and the Ptolemaic inequality respectively. The object of this paper is to solve generalizations of these functional equations.
Erdös, P., Hajnal, A.
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