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# Cosmic Topology

## observations

The Poincare dodecahedral space better explains the WMAP 3 year observations than the infinite flat model. We proposed a method that involves a cross-correlation function - this uses more information than the original identified circles method. An optimal cross-correlation appears to be a stable solution, and finds a twist angle of close to +36 degrees. ## theoretical work

The Poincare dodecahedral space is much better balanced, in the sense of the interaction between topology and gravity called the residual gravity effect, than other spaces. ## older work

## press releases

## courses that include some cosmic topology content

-- BoudRoukema - 14 Jul 2010

- ArXiv:0801.0006, ArXiv:0807.4260 - consistent with Luminet et al./Caillerie et al. and Aurich et al. analyses

- AstroPh:0602159, ArXiv:0902.3402 - the residual gravity acceleration effect

- WMAP - identified circles - MonographCosmo
- AstroPh:0402608
- however: see AstroPh:0604616, ArXiv:0801.1358, ArXiv:0801.0006

- mhg_20050615.ps: Calabretta & Roukema, draft - http://www.atnf.csiro.au/people/mcalabre/WCS/index.html

- AstroPh:0402608
- RLAGNs larger catalogue/histograms - Boud, Andrzej M, Staszek - mrb04
- root of the identity in the spherical case - Boud

Topic revision: r2 - 06 Sep 2010, BoudRoukema

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