English

Six New Mechanics corresponding to further Shape Theories

General Relativity and Quantum Cosmology 2016-04-13 v4

Abstract

A suite of relational notions of shape are presented at the level of configuration space geometry, with corresponding new theories of shape mechanics and shape statistics. These further generalize two quite well known examples: --1) Kendall's (metric) shape space with his shape statistics and Barbour's mechanics thereupon. 0) Leibnizian relational space alias metric scale-and-shape space to which corresponds Barbour-Bertotti mechanics. This paper's new theories include, using the invariant and group namings, 1) AngleAngle alias conformalconformal shapeshape mechanicsmechanics. 2) ArearatioArea ratio alias affineaffine shapeshape mechanicsmechanics. 3) Area Area alias affineaffine scalescale-andand-shapeshape mechanicsmechanics. 1) to 3) rest respectively on angle space, area-ratio space, and area space configuration spaces. Probability and statistics applications are also pointed to in outline. 4) Various supersymmetric counterparts of -1) to 3) are considered. Since supergravity differs considerably from GR-based conceptions of Background Independence, some of the new supersymmetric shape mechanics are compared with both. These reveal compatibility between supersymmetry and GR-based conceptions of Background Independence, at least within these simpler model arenas.

Keywords

Cite

@article{arxiv.1505.00488,
  title  = {Six New Mechanics corresponding to further Shape Theories},
  author = {Edward Anderson},
  journal= {arXiv preprint arXiv:1505.00488},
  year   = {2016}
}

Comments

33 pages, including 16 figures. Comments and references added