نتایج جستجو برای: homomorphism

تعداد نتایج: 3615  

Journal: :Comptes Rendus Mathematique 2016

Journal: :Proceedings of the National Academy of Sciences 1952

Journal: :Advances in Mathematics 1971

Journal: :Advances in Mathematics 2018

Journal: :Journal of the London Mathematical Society 2013

Journal: :Nanophotonics 2021

Abstract When solving, modeling or reasoning about complex problems, it is usually convenient to use the knowledge of a parallel physical system for representing it. This case lumped-circuit abstraction, which can be used mechanical and acoustic systems, thermal heat-diffusion problems in general partial differential equations. Integrated photonic platforms hold prospective perform signal proce...

2004
Teruaki Kitano Masaaki Suzuki Masaaki Wada TERUAKI KITANO MASAAKI SUZUKI MASAAKI WADA

If φ : G → G is a surjective homomorphism, we prove that the twisted Alexander polynomial of G is divisible by the twisted Alexander polynomial of G. As an application, we show non-existence of surjective homomorphism between certain knot groups.

2005
Teruaki Kitano Masaaki Suzuki Masaaki Wada

If ϕ : G → G ′ is a surjective homomorphism, we prove that the twisted Alexander polynomial of G is divisible by the twisted Alexander polynomial of G ′. As an application, we show non-existence of surjective homomorphism between certain knot groups.

Journal: :Discrete Applied Mathematics 2008
Gregory Gutin Arash Rafiey Anders Yeo

For digraphs D and H , a mapping f : V (D)→V (H) is a homomorphism of D to H if uv ∈ A(D) implies f(u)f(v) ∈ A(H). For a fixed directed or undirected graph H and an input graph D, the problem of verifying whether there exists a homomorphism of D to H has been studied in a large number of papers. We study an optimization version of this decision problem. Our optimization problem is motivated by ...

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