28 citations · 42 across the 9 of their papers we have counts for
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math.CO2010★ 4 cited
Ramanujan graphs of very large girth based on octonions
Xavier Dahan, Jean-Pierre Tillich
We present a generalization of the construction of graphs by Lubotzky, Phillips and Sarnak in their celebrated article "Ramanujan graphs". The new approach consists in using octoni…
cs.SC2010★ 4 cited
Bit-size estimates for triangular sets in positive dimension
Xavier Dahan, Abdulilah Kadri, Éric Schost
We give bit-size estimates for the coefficients appearing in triangular sets describing positive-dimensional algebraic sets defined over Q. These estimates are worst case upper bou…