Results 31 to 40 of about 8,500,141 (367)

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

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

Stability results for fractional integral pantograph differential equations involving two Caputo operators

open access: yesAIMS Mathematics, 2023
In this paper, we investigate the existence-uniqueness, and Ulam Hyers stability (UHS) of solutions to a fractional-order pantograph differential equation (FOPDE) with two Caputo operators.
Abdelkader Moumen   +4 more
doaj   +1 more source

Some results for a variation-inequality problem with fourth order p(x)-Kirchhoff operator arising from options on fresh agricultural products

open access: yesAIMS Mathematics, 2023
In this paper, we study variation-inequality initial-boundary value problems with fouth order p(x)-Kirchhoff operators. First, an operator is constructed based on the Leray Schauder principle, and the existence of solutions is obtained.
Tao Wu
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

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

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

Existence of symmetric central configurations [PDF]

open access: yes, 2014
Central configurations have been of great interest over many years, with the earliest examples due to Euler and Lagrange. There are numerous results in the literature demonstrating the existence of central configurations with specific symmetry properties,
Montaldi, James
core   +3 more sources

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

Existence of mesons after deconfinement [PDF]

open access: yes, 2007
We investigate the possibility for a quark-antiquark pair to form a bound state at temperatures higher than the critical one ($T>T_c$), thus after deconfinement. Our main goal is to find analytical criteria constraining the existence of such mesons.
E. V. Shuryak   +2 more
core   +5 more sources

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