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Abstract: Given a chain complex with the only modi?cation that each cell of the complex has a probability distribution assigned. We will call this complex - a random complex and what should be underst...
There have been several recent articles studying homology of various types of random simplicial complexes. Several theorems have concerned thresholds for vanishing of homology, and in some cases expec...
It is well-known that the Eulerian polynomials, which count permutations in Sn by their number of descents, give the h-polynomial/h-vector of the simple polytopes known as permutohedra, the convex hul...
Betti numbers of edge ideals of uniform hypergraphs      Betti number  hypergraph  Hilbert function  Stanley-Reisner ring        font style='font-size:12px;'> 2010/11/29
We describe the Betti numbers of the edge ideals I(G) of uniform hypergraphs G such that I(G) has linear graded free resolution.
Dependence of Betti Numbers on Characteristic      Dependence of Betti Numbers  Characteristic        font style='font-size:12px;'> 2010/12/9
We study the dependence of graded Betti numbers of monomial ideals on the characteristic of the base field. The examples we describe include bipartite ideals, Stanley–Reisner ideals of vertex-decompo...
We study the Jordan normal forms of the local and global monodromies over complete intersection subvarieties of Cn by using the theory of motivic Milnor fibers.The results will be explicitly described...
The purpose of this note is to give a refinement of the product formula proved in [1] for the Poincar´e polynomial of a smooth Schubert variety in the flag variety of an algebraic group G over ...
The Betti numbers of the moduli space of stable sheaves of rank 3 on P2      sheaves  moduli spaces       font style='font-size:12px;'> 2010/12/2
This article computes the generating functions of the Betti numbers of the moduli space of stable sheaves of rank 3 on P2 and its blow-up ~P2. Wall-crossing is used to obtain the Betti numbers on ~P2....
Integrality of L2-Betti numbers     Integrality  L2-Betti numbers       font style='font-size:12px;'> 2010/10/29
The Atiyah conjecture predicts that the L2-Betti numbers of a finite CW-complex with torsion-free fundamental group are integers. We show that the Atiyah conjecture holds (with an additional technica...

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