cyclic presentation
61Dihedral group of order 6 — The smallest non abelian group has 6 elements. It is a dihedral group with notation D3 (or D6, both are used) and the symmetric group of degree 3, with notation S3. This page illustrates many group concepts using this group as example. Contents 1 …
62Icosahedral symmetry — A Soccer ball, a common example of a spherical truncated icosahedron, has full icosahedral symmetry. A regular icosahedron has 60 rotational (or orientation preserving) symmetries, and a symmetry order of 120 including transformations that… …
63Dictyostelium discoideum — Fruiting bodies of D. discoideum Scientific classification Domain: Eukar …
64Dark energy — Not to be confused with dark matter, dark fluid, or dark flow. Physical cosmology …
65Attribution of recent climate change — Further information: Global warming, Climate change, and Climate change denial Attribution of recent climate change is the effort to scientifically ascertain mechanisms responsible for recent changes observed in the Earth s climate …
66Modular group — For a group whose lattice of subgroups is modular see Iwasawa group. In mathematics, the modular group Γ is a fundamental object of study in number theory, geometry, algebra, and many other areas of advanced mathematics. The modular group can be… …
67Braid group — In mathematics, the braid group on n strands, denoted by B n , is a certain group which has an intuitive geometrical representation, and in a sense generalizes the symmetric group S n . Here, n is a natural number; if n gt; 1, then B n is an… …
68Noma (disease) — Classification and external resources Noma (1836) ICD 10 A69.0 …
69Hyperkinesia — This article is about hyperkinesia, the pathologically increased muscular movement. For hyperkinesis, hyperactivity often seen in children, see Hyperkinesis. Hyperkinesia Basal ganglia and its normal pathways. This circuitry is often disrupted in …
70Nielsen transformation — In mathematics, especially in the area of abstract algebra known as combinatorial group theory, Nielsen transformations, named after Jakob Nielsen, are certain automorphisms of a free group which are a non commutative analogue of row reduction… …
