Results 11 to 20 of about 76,149 (301)

On the Existence and Uniqueness of the Scientific Method. [PDF]

open access: yesBiol Theory, 2014
The ultimate utility of science is widely agreed upon: the comprehension of reality. But there is much controversy about what scientific understanding actually means, and how we should proceed in order to gain new scientific understanding. Is there a method for acquiring new scientific knowledge? Is this method unique and universal?
Wagensberg J.
europepmc   +4 more sources

Straightening: existence, uniqueness and stability [PDF]

open access: yesProceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2014
Abstract One of the least studied universal deformations of incompressible nonlinear elasticity, namely the straightening of a sector of a circular cylinder into a rectangular block, is revisited here and, in particular, issues of existence and stability are addressed.
Michel Destrade   +3 more
openaire   +6 more sources

Coagulation and fragmentation processes with evolving size and shape profiles : a semigroup approach [PDF]

open access: yes, 2013
We investigate a class of bivariate coagulation-fragmentation equations. These equations describe the evolution of a system of particles that are characterised not only by a discrete size variable but also by a shape variable which can be either discrete
Smith, Ann Louise   +2 more
core   +4 more sources

Existence and Uniqueness of Algebraic Closures

open access: yesFormalized Mathematics, 2022
Summary This is the second part of a two-part article formalizing existence and uniqueness of algebraic closures, using the Mizar [2], [1] formalism. Our proof follows Artin’s classical one as presented by Lang in [3].
openaire   +3 more sources

Existence and Uniqueness of Nonmonotone Solutions in Porous Media Flow [PDF]

open access: yes, 2022
Existence and uniqueness of solutions for a simplified model of immiscible two-phase flow in porous media are obtained in this paper. The mathematical model is a simplified physical model with hysteresis in the flux functions.
Tillmann Kleiner   +3 more
core   +2 more sources

On one existence and uniqueness theorem

open access: yesLithuanian Mathematical Journal, 1968
The abstracts (in two languages) can be found in the pdf file of the article. Original author name(s) and title in Russian and Lithuanian: А. В. Кибенко, Л. Г. Чепурнова. Об одной теореме существования и единственности A. Kibenko, L. Čepurnova.
Kibenko, A. V., Chepurnova, L. G.
openaire   +2 more sources

Existence and Uniqueness [PDF]

open access: yes, 2011
The study of differential problems related to materials with fading memory began with the work of Graffi [111, 112]. Later on, these studies were considered by many authors, and in particular, a new important description of such phenomena was given by Dafermos in [47, 46], using semigroup theory, where besides existence and uniqueness of the solution ...
Giovambattista Amendola   +2 more
openaire   +1 more source

Existence and uniqueness for a class of nonlinear population diffusion system

open access: yesSystems Science & Control Engineering, 2017
In this paper, we introduce a class of nonlinear population diffusion system. Existence and uniqueness of strong solution are proved for stochastic age-dependent population diffusion system in Hilbert space by use of Gronwall's lemma and Burkholder–Davis–
Li Wang, Qimin Zhang
doaj   +1 more source

Existence Result and Uniqueness for Some Fractional Problem

open access: yesMathematics, 2019
In this article, by the use of the lower and upper solutions method, we prove the existence of a positive solution for a Riemann−Liouville fractional boundary value problem. Furthermore, the uniqueness of the positive solution is given.
Guotao Wang   +3 more
doaj   +1 more source

Existence and uniqueness of measure solutions for a system of continuity equations with non-local flow [PDF]

open access: yes, 2013
In this paper, we prove existence and uniqueness of measure solutions for the Cauchy problem associated to the (vectorial) continuity equation with a non-local ow.
Crippa, Gianluca   +1 more
core   +1 more source

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