A new site, Analysis Situs, has been created by a collective of mathematicians going by the name Henri Paul de Saint-Gervais. It offers students and professionals a different approach to mathematics, and to algebraic topology in particular. Analysis Situs, as Leibniz or Poincaré called it, is the science where a curve is in fact an equation, where circles and ellipses belong to the same family, where shapes are expressed algebraically. The site offers an original exploration of Henri Poincaré's Analysis Situs series of six papers, founding texts written between 1895 and 1904. Three approaches are possible: through the works themselves, through examples, or through a "modern" course. The last of these includes an introduction to polyhedra, leading up to the triangulation of surfaces.
