Bijective reflexions and coreflexions of commutative unars
Jaroslav Ježek, Tomáš Kepka (1996)
Acta Universitatis Carolinae. Mathematica et Physica
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Jaroslav Ježek, Tomáš Kepka (1996)
Acta Universitatis Carolinae. Mathematica et Physica
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Vladimir Volenec (1987)
Stochastica
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A laterally commutative heap can be defined on a given set iff there is the structure of a TST-space on this set.
Wacław Szymański (1977)
Annales Polonici Mathematici
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Rechnoi, V. (2005)
Lobachevskii Journal of Mathematics
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Dorota Bród, Anetta Szynal-Liana, Iwona Włoch (2022)
Czechoslovak Mathematical Journal
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We study generalized commutative Jacobsthal quaternions and generalized commutative Jacobsthal-Lucas quaternions. We present some properties of these quaternions and the relations between the generalized commutative Jacobsthal quaternions and generalized commutative Jacobsthal-Lucas quaternions.
A. Hulanicki, T. Pytlik (1973)
Studia Mathematica
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Ivan Chajda (2007)
Discussiones Mathematicae - General Algebra and Applications
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The concept of a commutative directoid was introduced by J. Ježek and R. Quackenbush in 1990. We complete this algebra with involutions in its sections and show that it can be converted into a certain implication algebra. Asking several additional conditions, we show whether this directoid is sectionally complemented or whether the section is an NMV-algebra.
Thomas Meyer (1997)
Studia Mathematica
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Let denote the space of all ω-ultradifferentiable functions of Roumieu type on an open interval I in ℝ. In the special case ω(t) = t we get the real-analytic functions on I. For with one can define the convolution operator , . We give a characterization of the surjectivity of for quasianalytic classes , where I = ℝ or I is an open, bounded interval in ℝ. This characterization is given in terms of the distribution of zeros of the Fourier Laplace transform of μ.