Results 21 to 30 of about 659,875 (310)

Regular Homomorphisms and Regular Maps

European Journal of Combinatorics, 2002
The authors study regular automorphisms of oriented maps. Their main concern is the problem of lifting and projecting map automorphisms. Regular homomorphisms of oriented maps essentially arise from a factorization by a subgroup of automorphisms. In this paper, this kind of map automorphisms is studied in detail.
Malnič, Aleksander, Nedela, Roman, Škoviera, Martin   +2 more
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Global existence and uniqueness of classical solutions for a generalized quasilinear parabolic equation with application to a glioblastoma growth model

Mathematical Biosciences and Engineering, 2017
This paper studies the global existence and uniqueness of classicalsolutions for a generalized quasilinear parabolic equation withappropriate initial and mixed boundary conditions.
Zijuan Wen, Meng Fan, Asim M. Asiri, Ebraheem O. Alzahrani, Mohamed M. El-Dessoky, Yang Kuang   +5 more
doaj   +1 more source

Maximal Product of Graphs under Vague Environment

Mathematical and Computational Applications, 2020
Graph models are found everywhere in natural and human made structures, including process dynamics in physical, biological and social systems. The product of graphs are appropriately used in several combinatorial applications and in the formation of ...
Behnaz Sheikh Hoseini, Muhammad Akram, Mehrnaz Sheikh Hoseini, Hosein Rashmanlou, Rajab Ali Borzooei   +4 more
doaj   +1 more source

Algebraic connections vs. algebraic D-modules: regularity conditions. [PDF]

, 2016
open2noThis paper is devoted to the comparison ot the notions of regularity for algebraic connections and regularity for (holonomic) algebraic D-modulesopenMaurizio, Cailotto; Luisa, FiorotCailotto, Maurizio; Fiorot ...

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On the sub–diffusion fractional initial value problem with time variable order

Advances in Nonlinear Analysis, 2021
We consider a fractional derivative with order varying in time. Then, we derive for it a Leibniz' inequality and an integration by parts formula. We also study an initial value problem with our time variable order fractional derivative and present a ...
Cuesta Eduardo, Kirane Mokhtar, Alsaedi Ahmed, Ahmad Bashir   +3 more
doaj   +1 more source

Regular Operator Equations: Conditions for Regularity [PDF]

Proceedings of the American Mathematical Society, 1982
Regular operator equations are causal equations admitting unique solutions and have the property that all of their limiting equations along solutions admit unique solutions. Sufficient conditions which guarantee that an operator equation x = T x x = Tx is regular are given in case T T is
openaire   +2 more sources

Alteration Information Extraction and Mineral Prospectivity Mapping in the Laozhaiwan Area Using Multisource Remote Sensing Data

Remote Sensing
Gold is a vital strategic resource for many countries. The Laozhaiwan area is an important gold resource base in Yunnan Province and even nationwide.
Qi Chen, Dayu Cai, Zhifang Zhao, Xiaoguang Yang, Yilong Wang, Xiao Jiang, Lei Xu, Haichuan Duan, Yang He, Xiaoxiao Zhang, Yiyang Wang, Ting Xu   +11 more
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On the Duality of Regular and Local Functions

Mathematics, 2017
In this paper, we relate Poisson’s summation formula to Heisenberg’s uncertainty principle. They both express Fourier dualities within the space of tempered distributions and these dualities are also inverse of each other.
Jens V. Fischer
doaj   +1 more source

A new characterization of fuzzy ideals of semigroups and its applications

Automatika, 2021
In this paper, we develop a new technique for constructing fuzzy ideals of a semigroup. By using generalized Green's relations, fuzzy star ideals are constructed.
Chunhua Li, Baogen Xu, Huawei Huang
doaj   +1 more source

Lower bound for the regularity index of fat points

, 2016
The problem to find an upper bound for the regularity index of fat points has been dealt with by many authors. In this paper we give a lower bound for the regularity index of fat points.
Van Thien, Phan
core   +1 more source