Subject: correction to my response
Date: Mon, 27 Oct 2003 10:46:50 -0500
From: Randall Helmstutler <rdh2y@virginia.edu>
Reply-To: "Randall D. Helmstutler" <rdh2y@cms.mail.virginia.edu>
To: Don Davis <dmd1@lehigh.edu>

For the algebraic topology discussion list:

Unfortunately I misread Gaucher's initial question and as a
result should retract my response.  My reply settles the
question when you want A ---> B \times_C D to be a weak
equivalence; however he needs this to be fibration, a much
more subtle question.

Apologies for all the confusion.

--Randall Helmstutler