Results 81 to 90 of about 1,070,702 (215)

Kernel Bounds for Parabolic Operators Having First‐Order Degeneracy at the Boundary

Mathematische Nachrichten, Volume 299, Issue 10, Page 2894-2917, October 2026.
ABSTRACT We study kernel estimates for parabolic problems governed by singular elliptic operators ∑i,j=1N+1qijDij+cDyy,cγ+1>0,γ=qN+1,N+1,$$\begin{equation*} \sum _{i,j=1}^{N+1}q_{ij}D_{ij}+c\frac{D_y}{y},\qquad \frac{c}{\gamma }+1>0, \quad \gamma =q_{N+1,N+1}, \end{equation*}$$in the half‐space R+N+1={(x,y):x∈RN,y>0}$\mathbb {R}^{N+1}_+=\lbrace (x,y ...
L. Negro, C. Spina
wiley   +1 more source

Semigroups of order-decreasing transformations [PDF]

, 2012
Let X be a totally ordered set and consider the semigroups of orderdecreasing (increasing) full (partial, partial one-to-one) transformations of X. In this Thesis the study of order-increasing full (partial, partial one-to-one) transformations has been
Umar, Abdullahi
core   +2 more sources

Fault‐Tolerant Fuzzy Boundary Control for Nonlinear Distributed Parameter Systems Under Limited Measurements and Markovian Failures

CAAI Transactions on Intelligence Technology, Volume 11, Issue 5, Page 1529-1545, October 2026.
ABSTRACT This paper proposes a boundary control method for nonlinear distributed parameter systems (DPSs) with limited boundary measurements (BMs), as typically encountered in networked cyber‐physical processes with spatially distributed dynamics such as thermal and biomedical diffusion systems.
Yanlin Li, Kaibo Shi, Yue Yu, Xiangkun Wang, Ming Zhu, Xiao Cai   +5 more
wiley   +1 more source

The Relationship between Some Regular Subsemigroups of HypG2

Journal of Mathematics, 2014
The concept of regular subsemigroups plays an important role in the theory of semigroup. In this work, we study the relationship between some regular subsemigroups on the monoid of all generalized hypersubstitutions of type τ=(2).
Weerapong Wongpinit, Sorasak Leeratanavalee   +1 more
doaj   +1 more source

C0-continuity of the Fröbenius-Perron semigroup

International Journal of Mathematics and Mathematical Sciences, 2002
We consider the Fröbenius-Perron semigroup of linear operators associated to a semidynamical system defined in a topological space X endowed with a finite or a σ-finite regular measure.
Andrés Navas, Sergio Plaza
doaj   +1 more source

On Vn-semigroups

Open Mathematics, 2015
In this paper, we give some new characterizations of orthodox semigroups in terms of the set of inverses of idempotents. As a generalization, a new class of regular semigroups, namely Vn-semigroups, is introduced.
Gu Ze, Tang Xilin
doaj   +1 more source

Regularizing Properties of Nonlinear Semigroups [PDF]

Proceedings of the American Mathematical Society, 1987
It is known that some classes of m m -accretive operators
openaire   +1 more source

Characterization of Lallement order on a regular semigroup

, 2017
In this paper a study of properties of the Mitsch order relation ’µ’ on a regular semigroup and Nambooripads order ’ν’ on any arbitrary regular semigroup is made. Mainly a characterization of Lallement order on a regular semigroup is obtained.
Srinivas, K. V. R.
core   +1 more source

A multiplication of e-varieties of regular $E$-solid semigroups by inverse semigroup varieties [PDF]

, 1997
summary:A multiplication of e-varieties of regular $E$-solid semigroups by inverse semigroup varieties is described both semantically and syntactically.
Kuřil, Martin
core   +1 more source

A study on soft rough semigroups and corresponding decision making applications

Open Mathematics, 2017
In this paper, we study a kind of soft rough semigroups according to Shabir’s idea. We define the upper and lower approximations of a subset of a semigroup.
Wang Qiumei, Zhan Jianming, Borzooei R.A.   +2 more
doaj   +1 more source