Two similar responses to yesterday's question........DMD
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Subject: Re: question abt Hopf algs
Date: Thu, 04 Sep 2003 11:45:54 -0700
From: Jim Lin <jimlin@ucsd.edu>

Jim-  I first saw it in Browder's article,

W. Browder, On Differential Hopf Algebras, Trans AMS, 107, (1963), 153-178.

I think it is a pretty readable article. Jim

At 09:23 AM 9/4/2003 -0400, you wrote:
>Subject: query
>Date: Wed, 3 Sep 2003 13:25:39 -0400 (EDT)
>From: James Stasheff <jds@math.upenn.edu>
>
>The primitive filtration of a Hopf algebra first occurs in
>_____________?
>The most readable source for a grad student would be ____________??
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Subject: Re: question abt Hopf algs
Date: Fri, 5 Sep 2003 15:05:22 +0200 (METDST)
From: William Browder <browder@imf.au.dk>

I used it in my paper "Differential Hopf Algebras" in the Transactions AMS
(about 1962) but I don't know if I was the first.  I don't know an earlier
reference.   Bill Browder