Results 101 to 110 of about 56,264 (249)

PENINGKATAN KOMPETENSI GURU PEMBINA OLIMPIADE MATEMATIKA SISWA SEKOLAH MENENGAH PERTAMA KABUPATEN MADIUN

open access: yesAs-Sidanah, 2019
The objective of this research is to describe the improvement of the competence of Olympic workshop participants in problem-solving of mathematics Olympiad for mathematics teachers of Junior High Schools in the Madiun Regency by using the qualitative ...
Mohammad Tohir
doaj   +1 more source

Further results on permanents of Laplacian matrices of trees

open access: yesOpen Mathematics
The research on the permanents of graph matrices is one of the contemporary research topic in algebraic combinatorics. Brualdi and Goldwasser characterized the upper and lower bounds of permanents of Laplacian matrices of trees.
Wu Tingzeng, Dong Xiangshuai
doaj   +1 more source

Geometric, Algebraic and Topological Combinatorics

open access: bronzeOberwolfach Reports, 2020
The 2019 Oberwolfach meeting “Geometric, Algebraic and Topological Combinatorics” was organized by Gil Kalai (Jerusalem), Isabella Novik (Seattle), Francisco Santos (Santander), and Volkmar Welker (Marburg). It covered a wide variety of aspects of Discrete Geometry, Algebraic Combinatorics with geometric flavor, and Topological Combinatorics.
Gil Kalai   +3 more
openalex   +4 more sources

Δ–Springer varieties and Hall–Littlewood polynomials

open access: yesForum of Mathematics, Sigma
The $\Delta $ -Springer varieties are a generalization of Springer fibers introduced by Levinson, Woo and the author that have connections to the Delta Conjecture from algebraic combinatorics.
Sean T. Griffin
doaj   +1 more source

Cubic surfaces and their invariants: Some memories of Raymond Stora

open access: yesNuclear Physics B, 2016
Cubic surfaces embedded in complex projective 3-space are a classical illustration of the use of old and new methods in algebraic geometry. Recently, they made their appearance in physics, and in particular aroused the interest of Raymond Stora, to the ...
Michel Bauer
doaj   +1 more source

Ore's theorem on subfactor planar algebras

open access: yes, 2019
This article proves that an irreducible subfactor planar algebra with a distributive biprojection lattice admits a minimal 2-box projection generating the identity biprojection.
Palcoux, Sebastien
core  

Local models of Shimura varieties, I. Geometry and combinatorics [PDF]

open access: yes, 2011
We survey the theory of local models of Shimura varieties. In particular, we discuss their definition and illustrate it by examples. We give an overview of the results on their geometry and combinatorics obtained in the last 15 years.
Pappas, G., Rapoport, M., Smithling, B.
core  

Hopf Algebras in Combinatorics

open access: yes, 2014
These notes -- originating from a one-semester class by their second author at the University of Minnesota -- survey some of the most important Hopf algebras appearing in combinatorics. After introducing coalgebras, bialgebras and Hopf algebras in general, we study the Hopf algebra of symmetric functions, including Zelevinsky's axiomatic ...
Grinberg, Darij, Reiner, Victor
openaire   +2 more sources

Valued Graphs and the Representation Theory of Lie Algebras

open access: yesAxioms, 2012
Quivers (directed graphs), species (a generalization of quivers) and their representations play a key role in many areas of mathematics including combinatorics, geometry, and algebra.
Joel Lemay
doaj   +1 more source

Loops, matchings and alternating-sign matrices [PDF]

open access: yes, 2003
The appearance of numbers enumerating alternating sign matrices in stationary states of certain stochastic processes is reviewed. New conjectures concerning nest distribution functions are presented as well as a bijection between certain classes of ...
de Gier, Jan
core  

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