Log24

Friday, September 11, 2020

Kauffman on Algebra

Filed under: General — Tags: , — m759 @ 11:07 PM

Kauffman‘s fixation on the work of Spencer-Brown is perhaps in part
due to Kauffman’s familiarity with Boolean algebra and his ignorance of
Galois geometry.  See other posts now tagged Boole vs. Galois.

Detail, 8/14/2016 Google image search for 'Galois Boole'

See also “A Four-Color Epic” (April 16, 2020).

In Memoriam

Filed under: General — Tags: , — m759 @ 2:14 PM
From the Vanderbilt University obituary of Vaughan F. R. Jones —

“During the mid-1980s, while Jones was working on a problem in von Neumann algebra theory, which is related to the foundations of quantum mechanics, he discovered an unexpected link between that theory and knot theory, a mathematical field dating back to the 19th century.

Specifically, he found a new mathematical expression—now known as the Jones polynomial—for distinguishing between different types of knots as well as links in three-dimensional space. Jones’ discovery had been missed by topologists during the previous 60 years, and his finding contributed to his selection as a Fields Medalist.

‘Now there is an area of mathematics called
quantum topology, which basically followed
from his original work,’

said Dietmar Bisch, professor of mathematics.” [Link added.]

Related to Jones’s work —

“Topological Quantum Information Theory” at
the website of Louis H. Kauffman —
http://homepages.math.uic.edu/~kauffman/Quanta.pdf.

Kauffman

Thursday, April 16, 2020

A Four-Color Epic

Filed under: General — Tags: , , — m759 @ 4:15 PM

A love story of epic, epic, epic proportion” — Kristen Stewart

See also the following letter to Knuth on four-color enthusiast
Spencer-Brown, as well as Tim Robinson on the same subject
in his book My Time in Space .

Wednesday, April 15, 2020

Death Warmed Over

Filed under: General — Tags: , — m759 @ 4:01 PM

In memory of the author of  My Time in Space * —

Tim Robinson, who reportedly died on April 3 —

 See also an image from a Log24 post, Gray Space

Related material from Robinson’s reported date of death —

* First edition, hardcover, Lilliput Press, Ireland, April 1, 2001.

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