My Little Pony (pilot episode) — My Little Pony is an children s television special originally aired in the United States on April 14, 1984.It was followed in 1985 by another special, .The two specials led to the continuing series My Little Pony in 1986, and were later… … Wikipedia
List of My Little Pony characters — This is a list of characters from the long running My Little Pony toy franchise. The My Little Pony franchise first debuted in the year 1400 B.C., the creation of American illustrator and designer Bonnie Zacherle. Together with sculptor Charles… … Wikipedia
Seiberg–Witten invariant — In mathematics, Seiberg–Witten invariants are invariants of compact smooth 4 manifolds introduced by harvtxt|Witten|1994, using the Seiberg Witten theory studied by harvs|txt=yes|last=Seiberg|last2=Witten|year1=1994a|year2=1994b during their… … Wikipedia
Homotopy groups of spheres — In the mathematical field of algebraic topology, the homotopy groups of spheres describe how spheres of various dimensions can wrap around each other. They are examples of topological invariants, which reflect, in algebraic terms, the structure… … Wikipedia
4-manifold — In mathematics, 4 manifold is a 4 dimensional topological manifold. A smooth 4 manifold is a 4 manifold with a smooth structure. In dimension four, in marked contrast with lower dimensions, topological and smooth manifolds are quite different.… … Wikipedia
Obstruction theory — In mathematics, obstruction theory is a name given to two different mathematical theories, both of which yield cohomological invariants. Contents 1 In homotopy theory 2 In geometric topology 3 In surgery theory … Wikipedia
Exotic R4 — In mathematics, an exotic R4 is a differentiable manifold that is homeomorphic to the Euclidean space R4, but not diffeomorphic. The first examples were found by Robion Kirby and Michael Freedman, by using the contrast between Freedman s theorems … Wikipedia
Donaldson's theorem — In mathematics, Donaldson s theorem states that a definite intersection form of a simply connected smooth manifold of dimension 4 is diagonalisable. If the intersection form is positive (negative) definite, it can be diagonalized to the identity… … Wikipedia
Digital soil mapping — (DSM) in soil science, or predictive soil mapping , is the computer assisted production of digital maps of soil type and soil properties. Digital Soil Mapping involves the creation and population of spatial soil information by the use of field… … Wikipedia
Clorpt — or Corpt is a mnemonic for Hans Jenny s famous state equation for soil formation: S = f(cl,o,r,p,t,….) S is for soil, cl (sometimes c) represents climate, o organisms including humans, r relief, p parent material, or lithology, and t time. Jenny… … Wikipedia
