User talk:Pm5

Hello there. I have just added a new article Bockstein homomorphism, in fact. The Cartan formula is perhaps already there at Steenrod algebra. Charles Matthews 11:09, 9 November 2005 (UTC)

You have incorrectly linked "Cartan formula" to this page! The "Cartan formula" (or "Cartan's magic formula") is standard terminology in differential geometry, where it interrelates the exterior derivative, the Lie derivative, and contraction with a vector field. This formula, which Raoul Bott called "the most important formula in differential geometry," is due to Elie Cartan, rather than his son Henri. The paper where it first appears is," Les systèmes différentiels extérieurs et leur applications géométriques" Please correct this link!

72.68.227.77 (talk) 15:21, 29 September 2014 (UTC)Claude LeBrun