two-sided lattice
11Semigroup — This article is about the algebraic structure. For applications to differential equations, see C0 semigroup. In mathematics, a semigroup is an algebraic structure consisting of a set together with an associative binary operation. A semigroup… …
12Society of the Mongol Empire — The expansion of the Mongol Empire over time. Main article: Mongol Empire Contents 1 Food in the Mongol Empire …
13Daily Life in the Mongol Empire — Food in the Mongolian EmpireDuring the Mongolian Empire there were two different groups of food, “white foods” and “red foods”. “White foods” were usually dairy products and were the main food source during the summer. The main dairy product that …
14Schoenflies notation — The Schoenflies notation is one of two conventions commonly used to describe crystallographic point groups. This notation is used in spectroscopy. The other convention is the Hermann Mauguin notation, also known as the International notation. A… …
15Clathrin — clathrin, light polypeptide (Lca) Identifiers Symbol CLTA Entrez 1211 HUGO …
16Close-packing of spheres — hcp and fcc close packing of spheres In geometry, close packing of spheres is a dense arrangement of equal spheres in an infinite, regular arrangement (or lattice). Carl Friedrich Gauss proved that the highest average density – that is, the… …
17Polyomino — The 18 one sided pentominoes, including 6 mirrored pairs …
18Fundamental polygon — In mathematics, each closed surface in the sense of geometric topology can be constructed from an even sided oriented polygon, called a fundamental polygon, by pairwise identification of its edges. Fundamental parallelogram defined by a pair of… …
19Rotational symmetry — Generally speaking, an object with rotational symmetry is an object that looks the same after a certain amount of rotation. An object may have more than one rotational symmetry; for instance, if reflections or turning it over are not counted, the …
20Symmetry combinations — This article discusses various symmetry combinations.In 2D, mirror image symmetry in combination with n fold rotational symmetry, with the center of rotational symmetry on the line of symmetry, implies mirror image symmetry with respect to lines… …
