Results 111 to 120 of about 1,364,858 (220)

On a boundary value problem for a parabolic-hyperbolic equation of the fourth order

Қарағанды университетінің хабаршысы. Математика сериясы
In this paper a boundary value problem for a fourth-order equation of parabolic-hyperbolic type within a pentagonal domain was investigated. In the equation under consideration, one characteristic aligns with the Ox axis while the other aligns with the ...
M. Mamajonov
doaj   +1 more source

Global existence for a class of quasilinear hyperbolic-parabolic equations

Tsukuba Journal of Mathematics, 1995
The author proves that, given \(u_0\) and \(u_1\), there is an \(\varepsilon_0> 0\) such that for any \(\varepsilon\leq \varepsilon_0\), the initial value problem \[ \varepsilon u_{tt}+ u_t- u_{xx}- (f(u_x))_x= 0,\;u(x, 0)= u_0(x),\;u_t(x, 0)= u_1(x), \] where \(f\) is a smooth increasing function on \(\mathbb{R}\), has a unique classical solution ...
openaire   +3 more sources

Acylindrical visual splittings and the Tits alternative for Artin groups

Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.
Abstract We give a necessary and sufficient condition on a visual splitting of an Artin group satisfying the conclusions of two well‐known conjectures to be acylindrical, and demonstrate how this can be used to provide a large class of novel examples of Artin groups that satisfy the Tits alternative.
William D. Cohen
wiley   +1 more source

Boundary Value Problems with Integral Gluing Conditions for Fractional-Order Mixed-Type Equation

International Journal of Differential Equations, 2011
Analogs of the Tricomi and the Gellerstedt problems with integral gluing conditions for mixed parabolic-hyperbolic equation with parameter have been considered.
A. S. Berdyshev, E. T. Karimov, N. Akhtaeva   +2 more
doaj   +1 more source

Modular analogs of character formulas and minimal lifts of modular forms

Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.
Abstract If f$f$ is a mod‐3 eigenform of weight 2 and level Γ0(ℓ2)$\Gamma _0(\ell ^2)$ for a prime ℓ$\ell$ such that ℓ≡−1(mod3)$\ell \equiv -1 \pmod {3}$, and ℓ$\ell$ is a vexing prime for f$f$, we show that there is no obstruction to finding a minimal lift of f$f$, but that there is an obstruction to finding a nonminimal lift.
Patrick B. Allen, Preston Wake
wiley   +1 more source

Free semigroups of large critical exponent

Journal of Topology, Volume 19, Issue 3, September 2026.
Abstract For a convergence group equipped with an expanding coarse‐cocycle, we construct finitely generated free subsemigroups, which we call Bishop−−Jonessemigroups$\textit{Bishop--Jones semigroups}$, of critical exponent arbitrarily close to but strictly less than the critical exponent of the ambient group.
Aleksander Skenderi
wiley   +1 more source

Bitsadze-Samarskii Type Problem for the Diffusion Equation and Degenerate Hyperbolic Equation

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
A boundary value problem of the Bitsadze-Samarskii type is studied in the article for a fractionalorder diffusion equation and a degenerate hyperbolic equation with singular coefficients at lower terms in an unbounded domain.
Ruziev, M.Kh., Zunnunov, R.T., Yuldasheva, N.T., Rakhimova, G.B.   +3 more
doaj   +1 more source

Obstacle problems for a coupling of quasilinear hyperbolic-parabolic equations

Interfaces and Free Boundaries, Mathematical Analysis, Computation and Applications, 2007
Summary: We establish the existence and uniqueness of the solution to some inner obstacle problems for a coupling of a multidimensional quasilinear first-order hyperbolic equation set in a region \(\Omega_h\) with a quasilinear parabolic one set in the complement \(\Omega_p= \Omega\setminus\Omega_h\).
openaire   +2 more sources

Effective length‐projection bounds for hyperbolic 3‐manifolds diffeomorphic to S×R$S\times \mathbb {R}$

Journal of Topology, Volume 19, Issue 3, September 2026.
Abstract We give a formula with explicit constants relating the subsurface projection dY(ν−,ν+)$d_Y(\nu ^-,\nu ^+)$ of the end invariants ν−,ν+$\nu ^-,\nu ^+$ of a hyperbolic 3‐manifold Q$Q$ diffeomorphic to S×R$S\times \mathbb {R}$ and the length of the geodesic representative in Q$Q$ of the multicurve ∂Y$\partial Y$.
Gabriele Viaggi
wiley   +1 more source

The Finite Difference Methods for Hyperbolic – Parabolic Equations [PDF]

AL-Rafidain Journal of Computer Sciences and Mathematics, 2005
Abbas Al-Bayati, Saad Manaa, Ekhlass Al-Rawi   +2 more
openaire   +2 more sources