Found 298 Documents (Results 1–100)
Representing matroids over the reals is \(\exists \mathbb{R}\)-complete. (English) Zbl 07914880
MSC:
05-XX
A geometric proof for the root-independence of the greedoid polynomial of Eulerian branching greedoids. (English) Zbl 1540.05068
An axiomatization of matroids and oriented matroids as conditional independence models. (English) Zbl 1539.05011
From hypertoric geometry to bordered Floer homology via the \(m = 1\) amplituhedron. (English) Zbl 1537.57022
Reviewer: Mee Seong Im (Annapolis)
Topological art in simple galleries. (English) Zbl 07826584
MSC:
68U05
Bicolored order types. (English) Zbl 1535.05047
Computing the fully optimal spanning tree of an ordered bipolar directed graph. (English) Zbl 1535.05123
Adjoints of matroids. (English) Zbl 1535.05055
Color-dressed generalized biadjoint scalar amplitudes: local planarity. (English) Zbl 07819247
Reviewer: Ngoc Mai Tran (Austin)
Sufficient conditions for linear stability of complex-balanced equilibria in generalized mass-action systems. (English) Zbl 1536.37085
Geometric, algebraic and topological combinatorics. Abstracts from the workshop held December 10–15, 2023. (English) Zbl 07921233
Convex hulls of random order types. (English) Zbl 07876161
MSC:
68-XX
The positive Grassmannian, the amplituhedron, and cluster algebras. (English) Zbl 07821709
Beliaev, Dmitry (ed.) et al., International congress of mathematicians 2022, ICM 2022, Helsinki, Finland, virtual, July 6–14, 2022. Volume 6. Sections 12–14. Berlin: European Mathematical Society (EMS). 4710-4737 (2023).
The geometry of geometries: matroid theory, old and new. (English) Zbl 1535.05051
Beliaev, Dmitry (ed.) et al., International congress of mathematicians 2022, ICM 2022, Helsinki, Finland, virtual, July 6–14, 2022. Volume 6. Sections 12–14. Berlin: European Mathematical Society (EMS). 4510-4541 (2023).
A SAT attack on Erdős-Szekeres numbers in \(\mathbb{R}^d\) and the empty hexagon theorem. (English) Zbl 1535.52016
Purity and separation for oriented matroids. (English) Zbl 1531.52001
Memoirs of the American Mathematical Society 1439. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-6700-5/pbk; 978-1-4704-7594-9/ebook). v, 79 p. (2023).
Reviewer: Kolja Knauer (Barcelona)
Hopf monoids and generalized permutahedra. (English) Zbl 07753149
Memoirs of the American Mathematical Society 1437. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-6708-1/pbk; 978-1-4704-7592-5/ebook). vi, 119 p. (2023).
Reviewer: Loïc Foissy (Calais)
The \(m=2\) amplituhedron and the hypersimplex: signs, clusters, tilings, Eulerian numbers. (English) Zbl 1531.05246
The visible-volume function of a set of cameras is continuous, piecewise rational, locally Lipschitz, and semi-algebraic in all dimensions. (English) Zbl 1523.52033
A classification of peak-pit maximal Condorcet domains. (English) Zbl 1525.91082
Reviewer: H. C. M. de Swart (Tilburg)
MSC:
91B14
Lattice of integer flows and the poset of strongly connected orientations for regular matroids. (English) Zbl 1530.05024
Reviewer: Kelly J. Pearson (Murray)
Rotor-routing induces the only consistent sandpile torsor structure on plane graphs. (English) Zbl 1522.05500
Universal complexes in toric topology. (English) Zbl 1535.57056
Reviewer: Ivan Limonchenko (Toronto)
Geometric bijections between spanning subgraphs and orientations of a graph. (English) Zbl 1521.05069
Triangulations of Grassmannians and flag manifolds. (English) Zbl 1526.57020
Reviewer: Branislav Prvulović (Beograd)
The geometry of sparse analysis regularization. (English) Zbl 1528.90188
Reviewer: Sorin-Mihai Grad (Paris)
Projections and angle sums of belt polytopes and permutohedra. (English) Zbl 1528.52005
Reviewer: Geir Agnarsson (Fairfax)
Separable and equatable hypergraphs. (English) Zbl 1518.05142
Reviewer: Amit Roy (Bhubaneswar)
The first higher Stasheff-Tamari orders are quotients of the higher Bruhat orders. (English) Zbl 1515.06006
Many order types on integer grids of polynomial size. (English) Zbl 1507.52012
Reviewer: C. P. Anil Kumar (Andhra Pradesh)
Enumerative problems for arborescences and monotone paths on polytope graphs. (English) Zbl 1522.05152
Morsifications and mutations. (English) Zbl 1520.13037
Interview with Tomaž Pisanski. (English) Zbl 1511.01038
MSC:
01A70
Geometry of dependency equilibria. (English) Zbl 1518.14003
Reviewer: Sonia Pérez Díaz (Madrid)
Perverse sheaves over real hyperplane arrangements. II. (English) Zbl 1514.14028
Reviewer: Richárd Rimányi (Chapel Hill)
A generalization of combinatorial identities for stable discrete series constants. (English) Zbl 07556730
On Tutte polynomial expansion formulas in perspectives of matroids and oriented matroids. (English) Zbl 1489.05017
Congruence normality of simplicial hyperplane arrangements via oriented matroids. (English) Zbl 1487.52030
Reviewer: Piotr Pokora (Kraków)
Hypersimplicial subdivisions. (English) Zbl 1476.52008
Polynomial-reproducing spline spaces from fine zonotopal tilings. (English) Zbl 1481.41003
Reviewer: Martin D. Buhmann (Gießen)
A SAT attack on higher dimensional Erdős-Szekeres numbers. (English) Zbl 07912972
Nešetřil, Jaroslav (ed.) et al., Extended abstracts EuroComb 2021. European conference on combinatorics, graph theory and applications, virtual, September 6–10, 2021. Cham: Birkhäuser. Trends Math., Res. Perspect. CRM Barc. 14, 103-110 (2021).
MSC:
05Cxx
Finitary affine oriented matroids. (English) Zbl 1506.05041
Reviewer: Brigitte Servatius (Worcester)
On a smallest topological triangle free \((n_4)\) point-line configuration. (English) Zbl 1498.52037
On degree sequences and eccentricities in pseudoline arrangement graphs. (English) Zbl 07497536
Mudgal, Apurva (ed.) et al., Algorithms and discrete applied mathematics. 7th international conference, CALDAM 2021, Rupnagar, India, February 11–13, 2021. Proceedings. Lect. Notes Comput. Sci. 12601, 259-271 (2021).
MSC:
68Wxx
Cell complexes, poset topology and the representation theory of algebras arising in algebraic combinatorics and discrete geometry. (English) Zbl 1512.05001
Memoirs of the American Mathematical Society 1345. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-5042-7/pbk; 978-1-4704-6914-6/ebook). vi, 135 p. (2021).
Reviewer: Jaak Henno (Tallinn)
The moduli space of matroids. (English) Zbl 1479.05045
Reviewer: Kelly J. Pearson (Murray)
P-flag spaces and incidence stratifications. (English) Zbl 1478.14072
Reviewer: Jacopo Gandini (Pisa)
Grassmannians and pseudosphere arrangements. (Grassmanniennes et arrangements de pseudo-sphères.) (English. French summary) Zbl 1468.52016
On the complexity of some geometric problems with fixed parameters. (English) Zbl 1457.05111
MSC:
05C85
Structure on the top homology and related algorithms. (English) Zbl 1469.57031
Reviewer: Michael Joswig (Berlin)
MSC:
57Q70
Local finiteness of the twisted Bruhat orders on affine Weyl groups. (English) Zbl 1473.20045
Reviewer: Erich W. Ellers (Toronto)
The \(r\)-signed Birkhoff transform. (English) Zbl 1491.06018
Reviewer: Ivan Chajda (Přerov)
Topological drawings meet classical theorems from convex geometry. (English) Zbl 07436624
Auber, David (ed.) et al., Graph drawing and network visualization. 28th international symposium, GD 2020, Vancouver, BC, Canada, September 16–18, 2020. Revised selected papers. Cham: Springer. Lect. Notes Comput. Sci. 12590, 281-294 (2020).
A universality theorem for stressable graphs in the plane. (English) Zbl 1464.52013
Reviewer: Piotr Pokora (Kraków)
Slide complexes and subword complexes. (English. Russian original) Zbl 1459.05360
Russ. Math. Surv. 75, No. 6, 1162-1164 (2020); translation from Usp. Mat. Nauk 75, No. 6, 177-178 (2020).
Two extensions of the Erdős-Szekeres problem. (English) Zbl 1454.52015
Reviewer: László A. Székely (Columbia)
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