Talk:Differential graded algebra

What does dga stand for?[edit]

I have the impression that dga stands for "differential graded associative", as in "dga algebra", rather than for "differential graded algebra". See my comment at Massey product talk page. Katzmik (talk) 15:30, 26 October 2008 (UTC)[reply]

So, by analogy, a differential graded Lie algebra is a dgl? Usually it's referred to as dgla. Maybe you have to say dgaa if you want to emphasize associativity.--98.210.233.15 (talk) 02:48, 11 May 2009 (UTC)[reply]

Cohomology ring example[edit]

The example "The Singular cohomology with coefficients in a ring is a DGA; the differential is given by the Bockstein homomorphism, and the product given by the cup product" seems suspect to me. This is special to Z/p coefficients, right? How else would you have a Bockstein from H^n(X;R) -> H^(n+1) (X,R) without changing the coefficients? — Preceding unsigned comment added by 71.212.22.229 (talk) 18:54, 21 December 2011 (UTC)[reply]

I agree. Will proceed to change (it's incredible it's been like this for so long!) Bruno321 (talk) 16:43, 2 September 2015 (UTC)[reply]

Examples of DG-algebras[edit]

What does the last line in 'Examples of DG-algebras->Tensor algebra' mean?

It doesn't explain what 'l' is, and looks as if the dot has merely been replaced by a tensor product symbol, AND has nothing to do with the 'd' operator this section is about.

Darcourse (talk) 11:38, 4 September 2021 (UTC)[reply]