Found 52 Documents (Results 1–52)
New necessary conditions for the existence of finite non-Desarguesian flag-transitive projective planes. (English) Zbl 1527.51001
Reviewer: Hubert Kiechle (Hamburg)
Toric Richardson varieties of Catalan type and Wedderburn-Etherington numbers. (English) Zbl 1511.14080
Atoms for signed permutations. (English) Zbl 1468.05303
Smooth Schubert varieties in the affine flag variety of type \(\tilde{A}\). (English) Zbl 1423.14304
Vexillary degeneracy loci classes in \(K\)-theory and algebraic cobordism. (English) Zbl 1408.14030
Reviewer: Richárd Rimányi (Chapel Hill)
Marked chain-order polytopes. (English) Zbl 1343.05163
An approach towards Schubert positivities of polynomials using Kraśkiewicz-Pragacz modules. (English) Zbl 1343.05168
Upper bounds on the size of 4- and 6-cycle-free subgraphs of the hypercube. (English) Zbl 1296.05096
Flag-transitive \(c\)-extensions of the \(F_4(2)\)-building – the amalgams. (English) Zbl 1111.51009
Reviewer: Günter F. Steinke (Christchurch)
Medial layer graphs of equivelar 4-polytopes. (English) Zbl 1110.52016
Reviewer: Wolfgang Kühnel (Stuttgart)
Base subsets of Grassmannians: infinite dimensional case. (English) Zbl 1106.51011
Reviewer: Richard Bödi (Rüschlikon)
Biplanes with flag-transitive automorphism groups of almost simple type, with alternating or sporadic socle. (English) Zbl 1113.20003
Reviewer: Alan R. Camina (Norwich)
Affine Hecke algebras and the Schubert calculus. (English) Zbl 1076.14068
Reviewer: Chen Chengdong (Shanghai)
The intersection cohomology of Schubert varieties is a combinatorial invariant. (English) Zbl 1064.14062
On homological properties of locally polar spaces. (English) Zbl 1066.51003
Reviewer: Linus K. H. Kramer (Würzburg)
Geometries for the group PSL\((3,4)\). (English) Zbl 1030.51009
Reviewer: Richard Bödi (Adliswil)
Homology of Newtonian coalgebras. (English) Zbl 1034.52010
Reviewer: P. McMullen (London)
MSC:
52B05
16W30
A characterization of Grassmann spaces of index \(h\) of a projective space. (English) Zbl 1029.51024
Reviewer: Corrado Zanella (Padova)
Flag vectors of Eulerian partially ordered sets. (English) Zbl 0971.06004
Reviewer: Joseph Neggers (Tuscaloosa)
Lower bounds for the \(cd\)-index of odd-dimensional simplicial manifolds. (English) Zbl 0960.52010
Reviewer: P.McMullen (London)
Weakly flag-transitive configurations and half-arc-transitive graphs. (English) Zbl 0945.05033
Reviewer: Cai Heng Li (Perth)
MSC:
05C25
Connectedness of opposite-flag geometries in Moufang polygons. (English) Zbl 0940.51004
Reviewer: E.Brožíková (Praha)
MSC:
51E12
A new family of extended generalized quadrangles. (English) Zbl 0872.51010
Reviewer: H.Van Maldeghem (Gent)
Exceptional extended dual polar spaces. (English) Zbl 0889.51002
Reviewer: A.Makhnev (Ekaterinburg)
A construction of extended generalized quadrangles using the Veronesean. (English) Zbl 0890.51011
Reviewer: H.Van Maldeghem (Gent)
Balanced labellings and Schubert polynomials. (English) Zbl 0871.05059
Reviewer: V.Drensky (Sofia)
Flag-transitive extensions of dual affine planes. (English) Zbl 0860.51005
Reviewer: H.Van Maldeghem (Gent)
The universal covers of the sporadic semibiplanes. (English) Zbl 0866.51004
Reviewer: H.Van Maldeghem (Gent)
Flag-transitivity in shadow geometries. (English) Zbl 0794.51009
Reviewer: H.Van Maldeghem (Gent)
MSC:
51E24
Shadow geometries and simple connectedness. (English) Zbl 0794.51008
Reviewer: H.Van Maldeghem (Gent)
MSC:
51E24
On some flag-transitive non-classical \(c.C_ 2\)-geometries. (English) Zbl 0769.51003
Reviewer: Th.Grundhöfer (Tübingen)
Affine extensions of the Petersen graph and 2-arc-transitive graphs of girth 5. (English) Zbl 0770.05026
Reviewer: K.Burian (Havířov)
MSC:
05B25
A classification of flag-transitive classical \(c.C_ 2\)-geometries by means of generators and relations. (English) Zbl 0735.51011
Reviewer: K.Strambach
Some polar towers. (English) Zbl 0753.05016
Reviewer: A.A.M.Cohen (Amsterdam)
A locally polar geometry associated with the group HS. (English) Zbl 0714.51003
Reviewer: St.Payne
A locally polar geometry associated with the group HS. (English) Zbl 0697.51008
Reviewer: Stan Payne
Some geometries for \(J_ 3\) and \(O'N\). (English) Zbl 0682.20011
Reviewer: G.Stroth
A finite flag-transitive geometry of extended \(G_ 2\)-type. (English) Zbl 0675.51005
Reviewer: H.Van Maldeghem
MSC:
51E25
A result on \(C_ 3\)-geometries. (English) Zbl 0672.51011
Reviewer: Th.Meixner
MSC:
51E25
Some locally finite flag-transitive buildings. (English) Zbl 0645.51013
Reviewer: J.W.P.Hirschfeld
Bruhat lattices, plane partition generating functions, and minuscule representations. (English) Zbl 0562.05003
Reviewer: E.Fuchs
On arranging regular incidence-complexes as faces of higher-dimensional ones. (English) Zbl 0538.51019
Reviewer: G.Stroth
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