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Tag Archives: expanders
Asymptotic group theory, 3
A Ramanujan graph is a connected finite graph of valency k whose eigenvalues (apart from k and −k) all have modulus at most 2√(k−1). This interval is the spectrum of the infinite kvalent tree T (regarded as an operator on … Continue reading →
Computational algebra in Lisbon
This week I was at a very nice workshop on Computational Algebra in Lisbon. Rarely do I learn so many new things at a conference, although it was only three days in duration. Here are some of the highlights, roughly … Continue reading →
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Tagged automated deduction, automorphic loops, constraint satisfaction, expanders, LDPCs, matroids, synchronization

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