Homology, Homotopy and Applications

Volume 11 (2009)

Number 2

Extensions of Weyl and Schur functors

Pages: 27 – 48

DOI: https://dx.doi.org/10.4310/HHA.2009.v11.n2.a3


Marcin Chałupnik (Instytut Matematyki, University of Warsaw, Poland)


We study Ext-groups in the category of strict polynomial functors. The main result is a computation of the Ext-groups between twisted Weyl and Schur functors for a large class of Young diagrams.


Ext-groups, Schur functor

2010 Mathematics Subject Classification

18G15, 20G10, 20G15

Published 1 January 2009