Talk:Formal group law
![]() | This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | ||||||||||
|
This is a great introduction; if someone could expand it, that would be great!
Not a group object?
[edit]Isn't a formal group a group object in the category of formal schemes? Spakoj 12:34, 2 May 2006 (UTC)
Rational?
[edit]Over the rational numbers, there is an isomorphism from the additive formal group law to the multiplicative one, given by exp(x) − 1.
I would mention here that exp(x) is seen here as a formal power series over the rationals, exp(x)=1+x+x^2/2+x^3/6+.. and also that log(x) is seen as a formal power series over the rationals. This would make it clear why you don't need to work over the field of real numbers. — Preceding unsigned comment added by 138.92.106.134 (talk) 14:22, 8 October 2015 (UTC)
O rly? —Preceding unsigned comment added by 91.45.173.61 (talk) 07:41, 14 April 2009 (UTC)
Start a discussion about improving the Formal group law page
Talk pages are where people discuss how to make content on Wikipedia the best that it can be. You can use this page to start a discussion with others about how to improve the "Formal group law" page.