Log24

Thursday, December 24, 2020

Change Arises: A Literary Example

Filed under: General — Tags: — m759 @ 12:12 PM

The “Change Arises” part of the title refers to the previous post.
The 1905 “geometric object” there, a 4×4 square, appeared earlier,
in 1869, in a paper by Camille Jordan. For that paper, and the
“literary example” of the title, see “Ici vient M. Jordan .”

This  post was suggested by the appearance of Jordan in today’s
memorial post for Peter M. Neumann by Peter J. Cameron.

Related remarks on Jordan and “geometrical objects” from 2016 —

These reflections are available from their author as a postprint.

Friday, December 18, 2020

De Corpore*

Filed under: General — m759 @ 4:14 PM

* De Corpore  had a negative effect on Hobbes’s scholarly reputation.
The inclusion of a claimed solution for squaring the circle, an apparent
afterthought rather than a systematic development, led to an extended
pamphlet war in the Hobbes-Wallis controversy.  — Wikipedia

Another afterthought, in the style of Kinbote  —
A search in this   journal for Peter M. Neumann
yields a link to Transformations over a bridge (1983 Aug. 16).

Tuesday, May 29, 2012

The Shining of May 29

Filed under: General,Geometry — Tags: — m759 @ 1:00 PM

(Continued from May 29, 2002)

May 29, 1832—

http://www.log24.com/log/pix12A/120529-Galois-Signature-500w.jpg

Évariste Galois, Lettre de Galois à M. Auguste Chevalier

Après cela, il se trouvera, j'espère, des gens qui trouveront leur profit à déchiffrer tout ce gâchis.

(Later there will be, I hope, some people who will find it to their advantage to decipher all this mess.)

Martin Gardner on the above letter—

"Galois had written several articles on group theory, and was merely annotating and correcting those earlier published papers."

The Last Recreations , by Martin Gardner, published by Springer in 2007, page 156.

Commentary from Dec. 2011 on Gardner's word "published" —

(Click to enlarge.)

IMAGE- Peter M. Neumann, 'Galois and His Groups,' EMS Newsletter, Dec. 2011

Wednesday, October 26, 2011

For Galois

Filed under: General,Geometry — m759 @ 12:00 PM

Tue Oct 25, 2011 08:26 AM [London time]
from the weblog of Peter Cameron

Today is Évariste Galois’ 200th birthday.

The event will be celebrated with the publication of a new transcription
and translation of Galois’ works (edited by Peter M. Neumann)
by the European Mathematical Society. The announcement is here.

Cameron's further remarks are also of interest.

Wednesday, October 15, 2008

Wednesday October 15, 2008

Filed under: General,Geometry — m759 @ 5:01 AM

Links for the birthday of the late mathematician Bernhard H. Neumann:

MacTutor biography of Neumann

Variety (Universal Algebra) at Wikipedia

Preface to Varieties of Groups (1967), by Hanna Neumann

Biography (1974 obituary) of Hanna Neumann

Peter M. Neumann home page

Some related notes on algebra suggested by finite geometry:

Dynamic and algebraic compatibility of groups (1985 Dec. 11)

Groups related by a nontrivial identity (1985 Nov. 17)

Transformations over a bridge (1983 Aug. 16)

Group identity algebras (1983 Aug. 4)

I have no idea if any work has been done in this area since my own efforts in 1983-1985.

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