101
Voted
ACS
2004
15 years 10 days ago
2004
: We characterize the (effective) E-descent morphisms in the category Cat of small categories, when E is the class of discrete fibrations or the one of discrete cofibrations, and p...
87
Voted
DMTCS
2007
15 years 12 days ago
2007
We define a morphism based upon a Latin square that generalizes the Thue-Morse morphism. We prove that fixed points of this morphism are overlap-free sequences, generalizing resu...
71
Voted
DM
2006
15 years 14 days ago
2006
We give a characterization of the non-empty binary relations