The formal group of the multiplicative group .

Its formal group law $f(x,y) \in R[ [x,y] ]$ is

$f(x,y) = x + y + x y
\,,$

The formal group law of topological K-theory which is induced by its canonical complex orientation is the multiplicative formal group law. See at *topological K-theory* the section *Complex orientation and Formal group law*

Last revised on June 6, 2017 at 12:08:18. See the history of this page for a list of all contributions to it.