On 27.11.2008 at 12:20 in S8, there is the following noon lecture:
Restricted dualities for graphs
Patrice Ossona de Mendez
A restricted duality for a class of graphs C is a pair (F,D) such that:
* F has no homomorphism to D
* for every graph G in C, F has no homomorphism to G if and only if G
has a homomorphism to D. We study which classes admit restricted dualities.
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