Timeline for Homology versus cohomology of Lie groups
Current License: CC BY-SA 3.0
2 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 1, 2012 at 8:56 | comment | added | Pierre | Dear Peter, pointing out that a sentence such as "the graded Hopf algebras over the rational field are classified" lacks precision is indeed harsh, if fair. The context being cohomology rings, graded commutativity seems implicit to me, and the fact that the Hopf-Borel theorem does not classify the possible diagonal maps seems irrelevant for the application I'm describing. I would have been more careful if (i) I had not given a reference for the full details and (ii) the original question had been more advanced. | |
| Jun 30, 2012 at 13:27 | history | answered | Peter May | CC BY-SA 3.0 |