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# Tag Archives: optimization

## Hoffman, Lovász and Haemers

At the weekend I attended remotely a memorial session for Alan Hoffman, organised by Bill Pulleyblank. I found it informative, as well as moving. Hoffman is well-known in the algebraic graph theory community for a number of remarkable achievements, including … Continue reading

Posted in events
Tagged Alan Hoffman, algebraic graph theory, eigenvalues, Laszlo Lovasz, optimization, WIllem Haemers
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## The definition of a matroid

This post continues my series about definitions. It has been obvious from the earliest days of the subject that matroids can be defined in very many different ways: in terms of their independent sets, their bases (maximal independent sets), their … Continue reading

Posted in exposition
Tagged 1-skeleton, cryptomorphic, Dima Fon-Der-Flaass, exchange axiom, IBIS family, optimization, polytope, Takeo Nakasawa
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