* Re: Who said: General Abstract Nonsense
@ 1998-05-20 0:30 Peter White
0 siblings, 0 replies; 4+ messages in thread
From: Peter White @ 1998-05-20 0:30 UTC (permalink / raw)
To: barr; +Cc: cat-dist
A quote from a Colin McLarty posting on another list:
" Norman Steenrod first hung this tag on category theory.
He had spent years trying to axiomatize homology, encouraged by
Solomon Lefschetz. Lefschetz had also backed the young topologist
Sammy Eilenberg, and encouraged Eilenberg's collaboration with the
algebraist Mac Lane explicating certain calculations in homology.
When Eilenberg and Mac Lane created category theory, Steenrod saw
he could use their way of emphasizing morphisms at least as
much as objects. He happily said this "abstract nonsense"
was the key to solving his problem.
The phrase was popularized by Lang's ALGEBRA, which
had an index entry under "abstract nonsense". The page numbers
sent you to various one line proofs such as "By abstract
nonsense, tensor products are unique up to isomorphism when
they exist". The joke got old and survives only vestigially in
the latest edition."
Peter White
On Tue, May 19th, Michael Barr wrote:
>
> This is interesting if indeed it was due to Steenrod. In that case, it
> was certainly not intended as a putdown (as Lang clearly intended it).
> Sammy Eilenberg told on a number of occasions the story that when General
> Theory of Natural Equivalences was published, Steenrod said that no paper
> had ever influenced his thinking more. He had been searching for years
> for an axiomatization of homology theory, but had never thought of using
> the induced homomorphisms as the basic tool. The result was, of course,
> the Eilenberg-Steenrod axioms. (The rest of the story is that P.A. Smith
> said he never read a more trivial paper in his life. Sammy commented that
> both reactions were valid.)
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Who said: General Abstract Nonsense
1998-05-19 17:34 ` Tim Heap
@ 1998-05-19 22:43 ` Michael Barr
0 siblings, 0 replies; 4+ messages in thread
From: Michael Barr @ 1998-05-19 22:43 UTC (permalink / raw)
To: Tim Heap; +Cc: pareigis, categories
This is interesting if indeed it was due to Steenrod. In that case, it
was certainly not intended as a putdown (as Lang clearly intended it).
Sammy Eilenberg told on a number of occasions the story that when General
Theory of Natural Equivalences was published, Steenrod said that no paper
had ever influenced his thinking more. He had been searching for years
for an axiomatization of homology theory, but had never thought of using
the induced homomorphisms as the basic tool. The result was, of course,
the Eilenberg-Steenrod axioms. (The rest of the story is that P.A. Smith
said he never read a more trivial paper in his life. Sammy commented that
both reactions were valid.)
On Tue, 19 May 1998, Tim Heap wrote:
> pareigis writes:
>
> Bodo> Hi - who coined the expression
> Bodo> General Abstract Nonsense
> Bodo> as a synonym for category theory? Where did it first appear in
> Bodo> print?
>
> Lang, in his book `Algebra' says:
> "The terminology is due to Steenrod."
>
> tim
>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Who said: General Abstract Nonsense
1998-05-17 8:00 pareigis
@ 1998-05-19 17:34 ` Tim Heap
1998-05-19 22:43 ` Michael Barr
0 siblings, 1 reply; 4+ messages in thread
From: Tim Heap @ 1998-05-19 17:34 UTC (permalink / raw)
To: pareigis; +Cc: categories
pareigis writes:
Bodo> Hi - who coined the expression
Bodo> General Abstract Nonsense
Bodo> as a synonym for category theory? Where did it first appear in
Bodo> print?
Lang, in his book `Algebra' says:
"The terminology is due to Steenrod."
tim
^ permalink raw reply [flat|nested] 4+ messages in thread
* Who said: General Abstract Nonsense
@ 1998-05-17 8:00 pareigis
1998-05-19 17:34 ` Tim Heap
0 siblings, 1 reply; 4+ messages in thread
From: pareigis @ 1998-05-17 8:00 UTC (permalink / raw)
To: categories
Hi -
who coined the expression
General Abstract Nonsense
as a synonym for category theory?
Where did it first appear in print?
Thanks for any comments.
Bodo
--------------------------------------------------------------------
Prof. Dr. Bodo Pareigis
Dept.of Mathematics, University of Munich
Theresienstr. 39, D-80333 Muenchen, GERMANY
...........................................
Email: pareigis@rz.mathematik.uni-muenchen.de
Web: http://www.mathematik.uni-muenchen.de/~pareigis
phone: office: +49 89-2394-4426
^ permalink raw reply [flat|nested] 4+ messages in thread
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