Coucher de soleil no. 1 sphere, also called Poincaré dodecahedral space, is a particular example of a homology sphere. Being a spherical 3-manifold, it is the only homology 3-sphere, besides the 3-sphere itself, with a finite fundamental group. While it is not known the extent to which such discoveries influenced Metzinger's representation of the radiating sun in "Coucher de soleil no. 1", his interest and prowess in mathematics is well documented. Coucher de soleil no. 1 Coucher de soleil no. 1 (also called Landscape, Paysage, Landschap, or Sunset No. 1) is an oil painting created circa 1906 by the French artist and theorist Jean Metzinger
Portes du Soleil Portes du Soleil Les Portes du Soleil (literally "The Doors of the Sun") is a major skisports destination in the Alps, encompassing thirteen resorts between Mont Blanc in France and Lake Geneva in Switzerland. With more than 650 km of marked pistes (claimed by the lift companies; an independent expert measured about 426 km ) and about 200 lifts in total, spread over 14 valleys and about , Portes du Soleil ranks among the two largest ski areas in the world (the other being Les Trois Vallées). Almost all of the pistes are connected by lifts – a few marginal