Preprint Article Version 9 Preserved in Portico This version is not peer-reviewed

Novel Recurrence Relations for Volumes and Surfaces of N-Balls, Regular N-Simplices, and N-Orthoplices in Real Dimensions

Version 1 : Received: 26 April 2022 / Approved: 27 April 2022 / Online: 27 April 2022 (14:19:49 CEST)
Version 2 : Received: 3 May 2022 / Approved: 5 May 2022 / Online: 5 May 2022 (10:21:33 CEST)
Version 3 : Received: 6 May 2022 / Approved: 9 May 2022 / Online: 9 May 2022 (09:39:25 CEST)
Version 4 : Received: 19 May 2022 / Approved: 20 May 2022 / Online: 20 May 2022 (09:09:43 CEST)
Version 5 : Received: 24 May 2022 / Approved: 25 May 2022 / Online: 25 May 2022 (09:54:32 CEST)
Version 6 : Received: 25 May 2022 / Approved: 26 May 2022 / Online: 26 May 2022 (08:54:38 CEST)
Version 7 : Received: 28 May 2022 / Approved: 30 May 2022 / Online: 30 May 2022 (11:28:08 CEST)
Version 8 : Received: 1 June 2022 / Approved: 1 June 2022 / Online: 1 June 2022 (09:43:58 CEST)
Version 9 : Received: 7 June 2022 / Approved: 8 June 2022 / Online: 8 June 2022 (12:29:03 CEST)
Version 10 : Received: 10 June 2022 / Approved: 10 June 2022 / Online: 10 June 2022 (16:13:45 CEST)
Version 11 : Received: 14 June 2022 / Approved: 16 June 2022 / Online: 16 June 2022 (10:39:40 CEST)
Version 12 : Received: 18 June 2022 / Approved: 20 June 2022 / Online: 20 June 2022 (09:40:53 CEST)
Version 13 : Received: 23 June 2022 / Approved: 27 June 2022 / Online: 27 June 2022 (11:17:06 CEST)

A peer-reviewed article of this Preprint also exists.

Łukaszyk, S. Novel Recurrence Relations for Volumes and Surfaces of n-Balls, Regular n-Simplices, and n-Orthoplices in Real Dimensions. Mathematics 2022, 10, 2212. Łukaszyk, S. Novel Recurrence Relations for Volumes and Surfaces of n-Balls, Regular n-Simplices, and n-Orthoplices in Real Dimensions. Mathematics 2022, 10, 2212.

Journal reference: Mathematics 2022, 10, 2212
DOI: 10.3390/math10132212

Abstract

The study examines n-balls, regular n-simplices, and n-orthoplices in real dimensions using novel recurrence relations that removed indefiniteness present in known formulas. They show that in the negative, integer dimensions volumes of n-balls are zero if n is even, positive if n = -4k - 1, and negative if n = -4k - 3, for natural k. Volumes and surfaces of n-cubes inscribed in n-balls in negative dimensions are complex, wherein for negative, integer dimensions they are associated with integral powers of the imaginary unit. The relations are continuous for n Î ℝ and show that the constant of π is absent for 0 ≤ n < 2. For n < -1 self-dual n-simplices are undefined in the negative, integer dimensions, and their volumes and surfaces are imaginary in the negative, fractional ones, and divergent with decreasing n. In negative, integer dimensions n-orthoplices reduce to the empty set, and their real volumes and imaginary surfaces are divergent in negative, fractional ones with decreasing n. Out of three regular, convex polytopes present in all natural dimensions, only n-orthoplices, n-cubes (and n-balls) are defined in the negative, integer dimensions.

Keywords

regular convex polytopes; negative dimensions; fractal dimensions

Subject

MATHEMATICS & COMPUTER SCIENCE, Geometry & Topology

Comments (1)

Comment 1
Received: 8 June 2022
Commenter: Szymon Łukaszyk
Commenter's Conflict of Interests: Author
Comment: 1. Proof of formula (25) (fn=2ngn);
2. Removal of the algebraic forms of diameter recurrence relations (they follow from Eq. (25))
3. Corrections and simplifications of Eqs.  (16), (19), (20).
4. The ratios (35)-(37) vanish in the negative, even dimensions, as gn=0. Not because they are metric independent, which is obvious.
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