Planck 2013 results
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Table 2

Lower limits on the size of the fundamental domain for different multiply-connected spaces, in units of the distance to the last scattering surface, χrec.

Space Quantity Δln ℒ < −5 Δln ℒ < −12.5
max marg max marg

T3 cubic torus L/ (2χrec) 0.83 0.92 0.76 0.83
T2 chimney L/ (2χrec) 0.71 0.71 0.63 0.67
T1 slab L/ (2χrec) 0.50 0.50 ... ...
Dodecahedron i/χrec 1.01 1.03 1.00 1.01
Truncated cube i/χrec 0.95 1.00 0.81 0.97
Octahedron i/χrec 0.87 0.89 0.87 0.88

Notes. For the torus, slab, and chimney, we present limits on the quantity L/ 2; in curved spaces, limits are on the inscribed-sphere topology scale i. For the columns labelled “max”, we maximize the probability over the orientation of the fundamental domain; for “marg”, we marginalize over orientation.

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