نتایج جستجو برای: kirchmeyer and cohen
تعداد نتایج: 16828570 فیلتر نتایج به سال:
Let $(R,\mathfrak m)$ be a commutative Noetherian local ring. There is variety of nice results about approximately Cohen-Macaulay rings. These were done by Goto. In this paper we prove some these for modules and generalize the concept rings to modules. It seen that when $M$ an module, any proper ideal $I$ have $grade(I,M) \geq \dim_R M -\dim_R M/IM -1$. Specially $R$ itself, obtain interval $gr...
We introduce a new family of simple graphs, so called, growing graphs. investigate ways to modify given graph G combinatorially obtain graph. One may infinitely many graphs from single show that obtained any is Cohen–Macaulay and every chordal also prove under certain conditions, if only its clique complex grafted give several equivalent conditions in this case. Our work inspired by generalizes...
G. A. Cohen has recently argued for a thesis about the relationship between facts and principles. He claims that Rawls denies this thesis, and the truth of this thesis vitiates Rawls’s constructivist procedure. I argue against both claims by developing an account of Rawls’s justificatory strategy and the role of facts in this strategy, which I claim is similar to the role of facts in some defen...
| Many commonly used time-frequency distributions are members of the Cohen class. This class is deened for continuous signals and since time-frequency distributions in the Cohen class are quadratic, the formulation for discrete signals is not straightforward. The Cohen class can be derived as the class of all quadratic time-frequency distributions that are covariant to time shifts and frequency...
In this paper, we use a characterization of R-modules N such that fdRN = pdRN to characterize Cohen-Macaulay rings in terms of various dimensions. This is done by setting N to be the dth local cohomology functor of R with respect to the maximal ideal where d is the Krull dimension of R.
Many commonly used time–frequency distributions are members of the Cohen class. This class is defined for continuous signals, and since time–frequency distributions in the Cohen class are quadratic, the formulation for discrete signals is not straightforward. The Cohen class can be derived as the class of all quadratic time–frequency distributions that are covariant to time shifts and frequency...
Natalia Calanzani ([email protected]) Katrien Moens ([email protected]) Joachim Cohen ([email protected]) Irene J Higginson ([email protected]) Richard Harding ([email protected]) Luc Deliens ([email protected]) Franco Toscani ([email protected]) Pedro L Ferreira ([email protected]) Claudia Bausewein ([email protected]) Barbara A Daveson (...
During the last decade, ecologists and particularly mathematical ecologists have focused on different approaches to the problem of spatial distribution of species. When the spatial distribution is not considered explicitly, the mathematical models are called spatially implicit. They consider the proportion of territory occupied by given species, but there is no information on which particular s...
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