Results 281 to 290 of about 161,720 (314)

Regular factors of regular graphs

Journal of Graph Theory, 1985
AbstractGiven r ⩾ 3 and 1 ⩽ λ ⩽ r, we determine all values of k for which every r‐regular graph with edge‐connectivity λ has a k‐factor.
Béla Bollobás, Akira Saito, Nicholas C. Wormald   +2 more
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How Regular are Regular Singularities?

2021
An abstract look at the work of Fuchs and Frobenius on the solutions of ordinary differential equations at regular singularites.
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How regular is regular? An analysis of menstrual cycle regularity

Contraception, 2004
We performed a retrospective analysis to ascertain how accurately women who believe that they have regular menstrual cycles estimate the length of their actual cycles. Data were extracted from a chart review of subjects from three different studies of barrier contraceptives.
Mitchell D, Creinin, Sharon, Keverline, Leslie A, Meyn   +2 more
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Spectral regularization and minEnt regularization

IEEE International Conference on Acoustics Speech and Signal Processing, 2002
In this paper, we propose the spectral regularization based on the conventional (spatial) regularization and the Fourier analysis. The entropy regularization is further developed and its connection to MinEnt principle is investigated. The underlying geometrical, physical and biological interpretation of spectral and entropic regularization are ...
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Regular Categories and Regular Functors

Canadian Journal of Mathematics, 1974
Let be a category with nice factorization-properties. If a functor G: —> which has a left-adjoint behaves nice with respect to factorizations then it can be shown quite easily that G behaves well in many other respects, especially that it lifts nice properties from into .
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Regular Rings are Very Regular

Canadian Mathematical Bulletin, 1982
The following problem arose in a conversation with Abraham Zaks: “Suppose R is an associative ring with identity such that every finitely generated left ideal is generated by idempotents. Is R von-Neumann regular?” In the literature the “s” in “idempotents” is missing, and is replaced by “an idempotent”. The answer is, “Yes!”
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On regular and regularised varieties

Algebra Universalis, 1986
Let V be an irregular variety defined by a set of regular identities and an identity of the form \(t(x,y)=t(x,z)\). (Any irregular variety can be defined in such a way.) A variety \(\bar V\) containing the regularization of V is introduced and studied. It has the following properties. \(\bar V\) is finitely based if V is.
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Regular Graphs, Eigenvalues and Regular Factors

Journal of Graph Theory, 2011
AbstractIn this article, we obtain a sufficient condition for the existence of regular factors in a regular graph in terms of its third largest eigenvalue. We also determine all values of k such that every r‐regular graph with the third largest eigenvalue at most has a k‐factor.
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Regular Nests

J. Autom. Lang. Comb., 2002
A language over a finite alphabet $X$ is regular if it can be accepted by a finite automaton. It is known that the family of all regular languages $L_3$ over $X$ is closed under catenation. This paper is a study of the regular property of the catenation of two languages.
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Factorization of regular multigraphs into regular graphs

Journal of Graph Theory, 1995
AbstractA regular multigraph with maximum multiplicity r and degree rs cannot always be factored into r s‐regular simple graphs. It is shown, however, that under general conditions a similar factorization can be achieved if we first allow the addition or deletion of a relatively small number of hamilton cycles.
Saad I. El-Zanati, Michael Plantholt, Shailesh K. Tipnis   +2 more
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