Results 1 to 10 of about 2,853,090 (311)

Critical Groups of Simplicial Complexes [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2011
We generalize the theory of critical groups from graphs to simplicial complexes. Specifically, given a simplicial complex, we define a family of abelian groups in terms of combinatorial Laplacian operators, generalizing the construction of the critical ...
Art M. Duval   +2 more
doaj   +7 more sources

Exponent-critical groups

open access: yesJournal of Group Theory
Abstract We define and investigate the property of being “exponent-critical” for a finite group. A finite group is said to be exponent-critical if its exponent is not the least common multiple of the exponents of its proper non-abelian subgroups. We explore properties of exponent-critical groups and give a characterization of such groups.
Simon R. Blackburn   +3 more
openaire   +3 more sources

Mothers’ groups during critical processes around birth

open access: yesPsicodebate, 2016
The article describes a clinical experience with groups of mothers of newborns who are ill and must stay in neonatology. This report tries to reflect on single session therapy within support-groups and also on psychologist ́s role when coping with ...
Alicia Mercado
doaj   +3 more sources

Multiplicity results for the Kirchhoff type equation via critical groups

open access: yesBoundary Value Problems, 2018
In this paper, we will compute critical groups at zero for the Kirchhoff type equation using the property that critical groups are invariant under homotopies preserving isolatedness of critical points.
Zhenting Wang   +3 more
doaj   +2 more sources

Eigenvalues and critical groups of Adinkras

open access: yesAdvances in Applied Mathematics, 2023
Adinkras are signed graphs used to study supersymmetry in physics. We provide an introduction to these objects, and study the properties of their signed adjacency and signed Laplacian matrices. These matrices each have exactly two distinct eigenvalues (of equal multiplicity), making Adinkras closely related to the notions of strongly regular graphs. We
Iga, Kevin   +3 more
openaire   +3 more sources

A multiplicity theorem for parametric superlinear (p,q)-equations [PDF]

open access: yesOpuscula Mathematica, 2020
We consider a parametric nonlinear Robin problem driven by the sum of a \(p\)-Laplacian and of a \(q\)-Laplacian (\((p,q)\)-equation). The reaction term is \((p-1)\)-superlinear but need not satisfy the Ambrosetti-Rabinowitz condition.
Florin-Iulian Onete   +2 more
doaj   +1 more source

Constant sign and nodal solutions for superlinear (p, q)–equations with indefinite potential and a concave boundary term

open access: yesAdvances in Nonlinear Analysis, 2020
We consider a nonlinear elliptic equation driven by the (p, q)–Laplacian plus an indefinite potential. The reaction is (p − 1)–superlinear and the boundary term is parametric and concave.
Papageorgiou Nikolaos S., Zhang Youpei
doaj   +1 more source

A Critical Mathematics Education for Climate Change [PDF]

open access: yes, 2021
Climate change is an urgent global challenge. Responding to climate change requires significant critical mathematical understanding on the part of all citizens.
Barwell, Richard, Hauge, Kjellrun Hiis
core   +1 more source

On critical groups [PDF]

open access: yesJournal of the Australian Mathematical Society, 1966
The concept of critical group was introduced by D. C. Cross (as reported byG. Higman in [5]): a finite group is calledcriticalif it is not contained in the variety generated by its proper factors. (Thefactorsof a groupGare the groups H/K where KH ≦G, and H/K is aproper factorofGunlessH = GandK=1).
Kovacs, L. G., Newman, M. F.
openaire   +2 more sources

Numerical renormalization group at criticality [PDF]

open access: yesPhysics Letters A, 1996
5 pages, LaTeX, 5 figures available upon ...
Nishino, T., Okunishi, K., Kikuchi, M.
openaire   +2 more sources

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