Results 31 to 40 of about 8,270,142 (310)

Computing projective equivalences of special algebraic varieties [PDF]

open access: yesJournal of Computational and Applied Mathematics, 2018
This paper is devoted to the investigation of selected situations when the computation of projective (and other) equivalences of algebraic varieties can be efficiently solved with the help of finding projective equivalences of finite sets on the ...
Michal Bizzarri   +2 more
semanticscholar   +1 more source

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

The Euclidean distance degree of smooth complex projective varieties [PDF]

open access: yesAlgebra & Number Theory, 2017
We obtain several formulas for the Euclidean distance degree (ED degree) of an arbitrary nonsingular variety in projective space: in terms of Chern and Segre classes, Milnor classes, Chern-Schwartz-MacPherson classes, and an extremely simple formula ...
P. Aluffi, Corey Harris
semanticscholar   +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

Addendum to `Fake Projective Planes'

open access: yes, 2009
The addendum updates the results presented in the paper `Fake Projective Plane, Invent Math 168, 321-370 (2007)' and makes some additions and corrections. The fake projective planes are classified into twenty six classes.
A. Borel   +8 more
core   +1 more source

Duality between the pseudoeffective and the movable cone on a projective manifold [PDF]

open access: yesJournal of The American Mathematical Society, 2016
We prove a conjecture of Boucksom-Demailly-Păun-Peternell, namely that on a projective manifold X X the cone of pseudoeffective classes in H R
D. Nystrom, S. Boucksom
semanticscholar   +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

Characteristic classes of Hilbert schemes of points via symmetric products

open access: yes, 2012
We obtain a formula for the generating series of (the push-forward under the Hilbert-Chow morphism of) the Hirzebruch homology characteristic classes of the Hilbert schemes of points for a smooth quasi-projective variety of arbitrary pure dimension. This
Baum   +18 more
core   +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

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