Results 11 to 20 of about 589,213 (311)

One characteristic problem for the general hyperbolic differential equation of the third order with nonmultiple characteristics

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012
In the paper we consider the well-posed characteristic problem for the general hyperbolic differential equation of the third order with nonmultiple characteristics. The solution of this problem is constructed in an explicit form. The illustrative example
Julia O Yakovleva
doaj   +3 more sources

On the pinned distances problem in positive characteristic [PDF]

open access: yesJournal of the London Mathematical Society, 2022
A substantial revision of the older version. The main results are unchanged.
Murphy, Brendan   +4 more
openaire   +2 more sources

On a characteristic problem for a loaded hyperbolic equation

open access: yesҚарағанды университетінің хабаршысы. Математика сериясы, 2019
The paper studies a loaded hyperbolic equation with one - dimensional wave equation in its main part. In the loaded components there are two points, which are distributed respectively along a pair of intersecting characteristics at a constant speed. For
A.Kh. Attaev
doaj   +1 more source

A quadratic Poisson Gel'fand-Kirillov problem in prime characteristic [PDF]

open access: yes, 2015
The quadratic Poisson Gel’fand-Kirillov problem asks whether the field of fractions of a Poisson algebra is Poisson birationally equivalent to a Poisson affine space, i.e. to a polyno-mial algebra K[X1,..., Xn] with Poisson bracket defined by {Xi, Xj} =
Lecoutre, Cesar   +3 more
core   +1 more source

The Boundary Value Problem of the Equations with Nonnegative Characteristic Form

open access: yesBoundary Value Problems, 2010
We study the generalized Keldys-Fichera boundary value problem for a class of higher order equations with nonnegative characteristic. By using the acute angle principle and the Hölder inequalities and Young inequalities we discuss the existence of ...
Li Limei, Ma Tian
doaj   +2 more sources

Karakteristik dan Persoalan Ekonomi Masyarakat Petani dan Nelayan pada Kawasan Pantai di Torosiaje Kabupaten Pohuwatu

open access: yesCaraka Tani: Journal of Sustainable Agriculture, 2018
High poverty level because of coastal area community characteristic include low of social-economic living,minimum access to environment resources, and economic problems. Such as Torosiaje coastal area community in Pohuwato regency, where used as research
Erlyna Wida Riptanti
doaj   +1 more source

A study on the matching problem of engine, propeller, and ship hull under actual service conditions

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2023
In ship design, the matching of engine, propeller, and hull is an analytical process to establish the optimal operating mode so that the engine works safely with full power and the lowest fuel consumption, and a ship reaches desired speed. In theory, the
Thai Gia Tran, Hyun Cheol Kim
doaj   +1 more source

Exact and approximate solutions of Riemann problems in non-linear elasticity [PDF]

open access: yes, 2009
Eulerian shock-capturing schemes have advantages for modelling problems involving complex non-linear wave structures and large deformations in solid media.
Barton, Philip Trevor   +3 more
core   +1 more source

The Transmittal-Characteristic Function of Three-Interval Periodic Sturm-Liouville Problem with Transmission Conditions

open access: yesJournal of New Theory, 2021
In this paper, we study the periodic Sturm-Liouville problem, defined on three non-intersecting intervals with four supplementary conditions which are imposed at two internal points of interaction, the so-calledtransmission conditions.
Oktay Mukhtarov, Kadriye Aydemir
doaj   +1 more source

Complexity and algorithms for Euler characteristic of simplicial complexes [PDF]

open access: yes, 2013
We consider the problem of computing the Euler characteristic of an abstract simplicial complex given by its vertices and facets. We show that this problem is #P-complete and present two new practical algorithms for computing Euler characteristic.
Roune, B.H.   +1 more
core   +1 more source

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