Results 21 to 30 of about 1,329,018 (301)

The role of w-tilting modules in relative Gorenstein (co)homology

open access: yesOpen Mathematics, 2021
Let RR be a ring, CC be a left RR-module and S=EndR(C)S={{\rm{End}}}_{R}\left(C). When CC is semidualizing, the Auslander class AC(S){{\mathcal{A}}}_{C}\left(S) and the Bass class ℬC(R){{\mathcal{ {\mathcal B} }}}_{C}\left(R) associated with CC have been
Bennis Driss   +3 more
doaj   +1 more source

On variations of m, n-totally projective Abelian p-groups [PDF]

open access: yesMathematica Moravica, 2014
We define some new classes of p-torsion Abelian groups which are closely related to the definitions of n-totally projective, strongly n-totally projective and m, n-totally projective groups introduced by P. Keef and P. Danchev in J. Korean Math.
Danchev Peter
doaj  

Function-based hybrid synchronization types and their coexistence in non-identical fractional-order chaotic systems

open access: yesAdvances in Difference Equations, 2018
This paper presents new results related to the coexistence of function-based hybrid synchronization types between non-identical incommensurate fractional-order systems characterized by different dimensions and orders.
Adel Ouannas   +4 more
doaj   +1 more source

Miyaoka–Yau inequalities and the topological characterization of certain klt varieties

open access: yesComptes Rendus. Mathématique
Ball quotients, hyperelliptic varieties, and projective spaces are characterized by their Chern classes, as the varieties where the Miyaoka–Yau inequality becomes an equality.
Greb, Daniel   +2 more
doaj   +1 more source

Jensen Δn1 Reals by Means of ZFC and Second-Order Peano Arithmetic

open access: yesAxioms
It was established by Jensen in 1970 that there is a generic extension L[a] of the constructible universe L by a non-constructible real a∉L, minimal over L, such that a is Δ31 in L[a].
Vladimir Kanovei, Vassily Lyubetsky
doaj   +1 more source

NORMAL FUNCTIONS FOR ALGEBRAICALLY TRIVIAL CYCLES ARE ALGEBRAIC FOR ARITHMETIC REASONS

open access: yesForum of Mathematics, Sigma, 2019
For families of smooth complex projective varieties, we show that normal functions arising from algebraically trivial cycle classes are algebraic and defined over the field of definition of the family.
JEFFREY D. ACHTER   +2 more
doaj   +1 more source

A class of projective planes [PDF]

open access: yesTransactions of the American Mathematical Society, 1965
1. Introduction. Finite non-Desarguesian projective planes have been known for all orders pf, where p is prime, n _ 2, and pn_ 9, except when p = 2 and n is a prime ? 5. In this paper a new class of projective planes is defined, having the orders 2n where n > 5 is not a power of two, thus establishing, in particular, the existence of non-Desarguesian ...
openaire   +2 more sources

Evidence‐Informed Multidisciplinary Consensus Guidance for the Psychosocial Care of Adolescents With High‐Risk Cancer: Recommendations From the Italian Association of Pediatric Hematology and Oncology

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Adolescents with high‐risk cancer face complex developmental, psychosocial, and ethical challenges that extend beyond disease‐directed treatment. Although international recommendations exist for communication, psychosocial care, pediatric palliative care, survivorship, and shared decision‐making, these have largely evolved within ...
Johanna M. C. Blom   +15 more
wiley   +1 more source

Tangency quantum cohomology and characteristic numbers

open access: yesAnais da Academia Brasileira de Ciências, 2001
This work establishes a connection between gravitational quantum cohomology and enumerative geometry of rational curves (in a projective homogeneous variety) subject to conditions of infinitesimal nature like, for example, tangency.
JOACHIM KOCK
doaj   +1 more source

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