P. Polo

activity

19992003

collaborators

3 papers

math.AT2003

Arrangements associated to chordal graphs and limits of colored braid groups

Frederic Chapoton, Patrick Polo

Let G be a chordal graph, X(G) the complement of the associated complex arrangement and Gamma(G) the fundamental group of X(G). We show that Gamma(G) is a limit of colored braid gr…

math.RT2000

Bernstein-Gelfand-Gelfand complexes and cohomology of nilpotent groups over $Z_{p}$ for representations with p-small weights

P. Polo, J. Tilouine

We show that for $p$ small highest weight $λ$ , 1) there is a $Z_{p}$ -integral version of the Bernstein-Gelfand-Gelfand complex, still a direct summand subcomplex of the standard comp…

math.AG1999

Large Schubert varieties

Michel Brion, Patrick Polo

For a semisimple adjoint algebraic group $G$ and a Borel subgroup $B$ , consider the double classes $B w B$ in $G$ and their closures in the canonical compactification of $G$ : we call…

Arrangements associated to chordal graphs and limits of colored braid groups

Bernstein-Gelfand-Gelfand complexes and cohomology of nilpotent groups over Zp​ for representations with p-small weights

Large Schubert varieties

Bernstein-Gelfand-Gelfand complexes and cohomology of nilpotent groups over $Z_{p}$ for representations with p-small weights