Kolaitis and Kopparty have shown that for any first-order formula with
parity quantifiers over the language of graphs there is a family of
multi-variate polynomials of constant-degree that agree with the
formula on all but a $2^{-\Omega(n)}$-fraction of the graphs with $n$
vertices. The proof yields a bound on the ... more >>>

A set of multivariate polynomials, over a field of zero or large characteristic, can be tested for algebraic independence by the well-known Jacobian criterion. For fields of other characteristic $p>0$, there is no analogous characterization known. In this paper we give the first such criterion. Essentially, it boils down to ... more >>>

Given a graph $G$, we consider the problem of finding the largest set
of edge-disjoint triangles contained in $G$. We show that even the
simpler case of decomposing the edges of
a sparse split graph $G$ into edge-disjoint triangles
is NP-complete. We show next that the case of a general ... more >>>