Whitehead torsion — In mathematics, Whitehead torsion is an invariant of an h cobordism in a Whitehead group, that is important in simple homotopy theory and surgery theory. It is named for J. H. C. Whitehead.Whitehead torsionSuppose that W is an h cobordism from M… … Wikipedia
Whitehead problem — In group theory, a branch of abstract algebra, the Whitehead problem is the following question::Is every abelian group A with Ext1( A , Z) = 0 a free abelian group?Abelian groups satisfying this condition are sometimes called Whitehead groups, so … Wikipedia
Whitehead, County Antrim — Infobox Irish Place name = Whitehead gaeilge = An Cionn Bán crest motto = map pin coords = left: 175px; top: 65px north coord = 54.45 | west coord = 5.42 elevation = province = Ulster county = County Antrim NI district = Carrickfergus Borough UK… … Wikipedia
Whitehead's Spiny Rat — Conservation status Vulnerable (IUCN 3.1) Scientific classification Kin … Wikipedia
Whitehead's lemma — is a technical result in abstract algebra, used in algebraic K theory, It states that a matrix of the form : egin{bmatrix}u 0 0 u^{ 1} end{bmatrix} is equivalent to identity by elementary transformations (here elementary matrices means… … Wikipedia
Whitehead theorem — In homotopy theory (a branch of mathematics), the Whitehead theorem states that if a continuous mapping f between topological spaces X and Y induces isomorphisms on all homotopy groups, then f is a homotopy equivalence provided X and Y are… … Wikipedia
Whitehead, Alfred North — (1861 1947) by Roland Faber Alfred North Whitehead is one of the more hidden but influential sources of Deleuze s thought. Unlike philosophers on whom Deleuze wrote books, Whitehead appears only in scattered remarks but, nevertheless, in a… … The Deleuze dictionary
Whitehead, Alfred North — (1861 1947) by Roland Faber Alfred North Whitehead is one of the more hidden but influential sources of Deleuze s thought. Unlike philosophers on whom Deleuze wrote books, Whitehead appears only in scattered remarks but, nevertheless, in a… … The Deleuze dictionary
Whitehead product — The Whitehead product is a graded quasi Lie algebra structure on the homotopy groups of a space. It was defined by J. H. C. Whitehead in an Annals of Mathematics paper from 1941. Given elements f in pi k(X), g in pi l(X), the Whitehead bracket :… … Wikipedia
Whitehead conjecture — The Whitehead conjecture is a claim in algebraic topology. It was formulated by J. H. C. Whitehead in 1941. It states that every connected subcomplex of a two dimensional aspherical CW complex is aspherical.In 1997, Mladen Bestvina and Noel Brady … Wikipedia
