EuDML | Browse

Page 1

Displaying 1 – 5 of 5

Elliptic cohomologies: an introductory survey.

Guillermo Moreno (1992)

Publicacions Matemàtiques

Let α and β be any angles then the known formula sin (α+β) = sinα cosβ + cosα sinβ becomes under the substitution x = sinα, y = sinβ, sin (α + β) = x √(1 - y2) + y √(1 - x2) =: F(x,y). This addition formula is an example of "Formal group law", which show up in many contexts in Modern Mathematics.In algebraic topology suitable cohomology theories induce a Formal group Law, the elliptic cohomologies are the ones who realize the Euler addition formula (1778): F(x,y) =: (x √R(y) + y √R(x)/1 - εx2y2)....

Elliptic cohomology

Graeme Segal (1987/1988)

Séminaire Bourbaki

Equivariant formal group laws and complex oriented cohomology theories.

Greenlees, J.P.C. (2001)

Homology, Homotopy and Applications

Existence of $A_{\infty}$ weak homotopy equivalences between spectra for U-bordism with singularities

Magalhães, Luísa (1988)

Portugaliae mathematica

Extensions of umbral calculus II: double delta operators, Leibniz extensions and Hattori-Stong theorems

Francis Clarke, John Hunton, Nigel Ray (2001)

Annales de l’institut Fourier

We continue our programme of extending the Roman-Rota umbral calculus to the setting of delta operators over a graded ring $E_{*}$ with a view to applications in algebraic topology and the theory of formal group laws. We concentrate on the situation where $E_{*}$ is free of additive torsion, in which context the central issues are number- theoretic questions of divisibility. We study polynomial algebras which admit the action of two delta operators linked by an invertible power series, and make related constructions...