منابع مشابه
Beyond Orthodox Semigroups
We introduce the notions of a generalised category and of an inductive generalised category over a band. Our purpose is to describe a class of semigroups which we name weakly B-orthodox. In doing so we produce a new approach to characterising orthodox semigroups, by using inductive generalised groupoids. Here B denotes a band of idempotents; we note that if B is a semilattice then a weakly B-or...
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In this paper, we consider another generalization for quasi-ideal orthodox transversal, the so-called S0-orthodox transversals. We give a structure theorem for regular semigroups with S0-orthodox transversals. If S0 is a S0-orthodox transversal of S then S can be described in terms of S0. Mathematics Subject Classification: 20M10
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We prove that if a super-Poincaré inequality is satisfied by an infinitesimal generator −A of a symmetric contraction semigroup on L2 and that is contracting on L1, then it implies a corresponding super-Poincaré inequality for −g(A) for any Bernstein function g. We also study the converse of this statement. We prove similar results for Nash-type inequalities. We apply our results to Euclidean, ...
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Presenting a paper to any conference with the name ‘Keynes’ in the title, particularly to one sponsored by the Post Keynesian Study Group, is fraught with danger. For the exegitical debate about ‘what Keynes really meant’ is often carried out with as much fervour as the arguments between the Fathers of the early Church. Indeed, some of the latter material has a familiar sound. Origen, for examp...
متن کاملExercises in orthodox geometry
Here is a collection of interesting problems in geometry. Solution of each problem requires only one non-trivial idea. The project is oriented to graduate students who want to learn fast simple tricks in geometry. For problem solvers. Easy problems are marked by “◦” and hard problems by “∗”. If the solution requires knowledge of some not quite standard theorem it is marked by “+”, in this case ...
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ژورنال
عنوان ژورنال: Pure Mathematics
سال: 2013
ISSN: 2160-7583,2160-7605
DOI: 10.12677/pm.2013.32018