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14 Nov 2020: 63. Makers of Patterns:From Escher to CoxeterAlexis Marchand. Dutch artist M. C. Escher was fascinated with the ideaof representing infinity within a finite piece of art.Among many sources of mathematical inspiration, acorrespondence with the

5 Jun 2020: Admittedly, I am afraid it is us who will be dead when that day arrives.” But about 7 years later, you could download degree distributions for LDPC codes that approach capacity

6 May 2020: Rigidity Theorems for Hyperbolic Groups. Alexis Marchand. Abstract. The purpose of this essay is to study actions of hyperbolic groups on real trees. After de-veloping the basic theory of hyperbolic metric spaces and groups, including an