Results 11 to 20 of about 6,852,813 (291)

Einstein solvmanifolds: existence and non-existence questions [PDF]

open access: yesMathematische Annalen, 2010
The general aim of this paper is to study which are the solvable Lie groups admitting an Einstein left invariant metric. The space N of all nilpotent Lie brackets on R^n parametrizes a set of (n+1)-dimensional rank-one solvmanifolds, containing the set ...
Lauret, Jorge, Will, Cynthia
core   +3 more sources

Truth and Existence [PDF]

open access: yes, 2017
Halbach has argued that Tarski biconditionals are not ontologically conservative over classical logic, but his argument is undermined by the fact that he cannot include a theory of arithmetic, which functions as a theory of syntax.
Heylen, Jan, Horsten, Leon
core   +4 more sources

Existence and non existence results for the singular Nirenberg problem [PDF]

open access: yes, 2016
In this paper we study the problem, posed by Troyanov (Trans AMS 324: 793–821, 1991), of prescribing the Gaussian curvature under a conformal change of the metric on surfaces with conical singularities.
DE MARCHIS, Francesca   +1 more
core   +1 more source

IDENTIFICATION OF THE RIGHT HAND SIDE OF A QUASILINEAR PSEUDOPARABOLIC EQUATION WITH MEMORY TERM

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2021
The study of equations of mathematical physics, including inverse problems, is relevant today. This work is devoted to the fundamental problem of studying the solvability and qualitative properties of the solution of the inverse problem for a ...
S. E. Aitzhanov   +2 more
doaj   +1 more source

Structural Complexity and Benthic Cover Explain Reef-Scale Variability of Fish Assemblages in Los Roques National Park, Venezuela

open access: yesFrontiers in Marine Science, 2019
Global and local stressors are causing the worldwide loss of coral cover and structural complexity at an unprecedented pace on reefs. In consequence, the habitat of coral reef fish has suffered a profound degradation affecting the abundance, biodiversity
Esteban A. Agudo-Adriani   +3 more
doaj   +1 more source

Self-realizing a lived existence in service of emancipation: Tsenay Serequeberhan’s activist hermeneutics

open access: yesActa Academica, 2023
Through his own activistic hermeneutics, Sereque­ berhan crafts a philosophy which allows African(a) persons pathways to self­-realization and self­-eman­cipation from Western cultural imperialism.
Justin Sands
doaj   +1 more source

Czy istnienie może być lepsze albo gorsze od nieistnienia? Część I: Ustalanie wartości w ramach dobrostanu

open access: yesAnaliza i Egzystencja, 2016
CAN EXISTENCE BE BETTER OR WORSE THAN NONEXISTENCE? PART I The aim of this paper is to examine whether there is any possibility to compare thevalue of someone’s existence with his nonexistence.
Mirosław Rutkowski
doaj   +1 more source

Gunky time and indeterminate existence [PDF]

open access: yes, 2017
The paper criticizes an argument recently presented by Ross Cameron. The argument purports to show that, if time is gunky (that is, if there are no time atoms), and if changes in existence are underwritten by events of coming to be, then there are cases ...
Spolaore, Giuseppe Mario
core   +1 more source

The existence of time [PDF]

open access: yes, 2010
Of those gauge theories of gravity known to be equivalent to general relativity, only the biconformal gauging introduces new structures - the quotient of the conformal group of any pseudo-Euclidean space by its Weyl subgroup always has natural symplectic
Abraham R. H.   +7 more
core   +1 more source

Existence of Nontrivial Solutions for Sixth-Order Differential Equations

open access: yesMathematics, 2021
We show the existence of at least one nontrivial solution for a nonlinear sixth-order ordinary differential equation is investigated. Our approach is based on critical point theory.
Gabriele Bonanno   +2 more
doaj   +1 more source

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