Tag: Geometry Page 2 of 7

Geometric Incarnation

The  Kummer 166  configuration  is the configuration of sixteen 6-sets within a 4×4 square array of points in which each 6-set is determined by one of the 16 points of the array…

Moonshine II

(Continued from yesterday) The foreword by Wolf Barth in the 1990 Cambridge U. Press reissue of Hudson's 1905 classic Kummer's Quartic Surface covers some of the material in yesterday's post Moonshine. The…

Mathematics and Narrative (continued)

Short Story — (Click image for some details.) Parts of a longer story — The Galois Tesseract and Priority.

Galois Coordinates

Today's previous post on coordinate systems suggests a look at the phrase "Galois coordinates." A search shows that the phrase, though natural, has apparently not been used before…

Permanence

"What we do may be small, but it has   a certain character of permanence." — G. H. Hardy, A Mathematician's Apology The diamond theorem  group, published without…

Codes

The hypercube  model of the 4-space over the 2-element Galois field GF(2): The phrase Galois tesseract  may be used to denote a different model of the above 4-space: the 4×4 square….

Priority Claim

From an arXiv preprint submitted July 18, 2011, and last revised on March 11, 2013 (version 4): "By our construction, this vector space is the dual of our hypercube…

The Octad Generator

… And the history of geometry —  Desargues, Pascal, Brianchon and Galois in the light of complete n-points in space. (Rewritten for clarity at about 10 AM ET April…

Rosenhain and Göpel Revisited

Some historical background for today's note on the geometry underlying the Curtis Miracle Octad Generator (MOG): The above incidence diagram recalls those in today's previous post on the MOG, which…

Note on the MOG Correspondence

In light of the April 23 post "The Six-Set," the caption at the bottom of a note of April 26, 1986 seems of interest: "The R. T. Curtis…