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Monday, April 20, 2020

Geometry for Poets

Filed under: General — Tags: — m759 @ 3:23 pm

From Atomicity and Quanta  by James Jeans,
Cambridge University Press, 1926, pp. 55-56 —

“So far as we can at present conjecture, the investigation of the structure which produces this atomicity appears to be the big problem in the path of the quantum-theory. To conform to the principle of relativity, the new atomicity must admit of expression in terms of the space-time continuum, although we have seen that it cannot be an atomicity of the continuum itself. It may conceivably be an atomicity of its metric properties, such as determine its curvatures. We may perhaps form a very rude picture of it by imagining the curvature of the continuum in the neighbourhood of an atom not to be of the continuous nature imagined by Weyl, but to occur in finite chunks—a straight piece, then a sudden bend, then another straight bit, and so on. A small bit of the continuum viewed through a five-dimensional microscope might look rather like a cubist picture; and, conversely, perhaps a cubist picture looks rather more like a little fragment of the continuum than like anything else.”

This is, of course, not the “atomicity” of  the previous post.
For examples of that  atomicity, a concept of pure geometry
rather than of physics, see

Faure, C. A., and Frölicher, A., “Fundamental Notions of
Lattice Theory,” in Modern Projective Geometry  (2000).
(Mathematics and Its Applications, vol 521. Springer, Dordrecht.)

Related art (a “cubist picture”) —

Juan Gris, Fruit Dish and Carafe , 1914

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