Acronym | ... |
Name |
rectified/ambified n/d-prism, o o-n/d-o symmetric co relative |
© | |
Circumradius | 1/[sqrt(2) sin(π d/n)] |
Face vector | 3n, 6n, 3n+2 |
Especially | retrip (n/d=3) co (n/d=4) repip (n/d=5) |
Confer |
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External links |
Rectification wrt. a non-regular polytope is meant to be the singular instance of truncations on all vertices at such a depth that the hyperplane intersections on the former edges will coincide (provided such a choice exists). Within the specific case of n/d-p as a pre-image these intersection points might differ on its 2 edge types. Therefore n/d-p in generally cannot be rectified (within this stronger sense). Nonetheless the Conway operator of ambification (chosing the former edge centers generally) clearly is applicable. This would result in 2 different edge sizes in the outcome polyhedron. That one here is scaled such so that the square sides become unity. Then the shorter edge will have size c = x(n/d)/x(4) = sqrt(2) cos(π d/n).
All q = sqrt(2) edges, used in the below descriptions, only qualify as pseudo edges wrt. the full polyhedron.
Note that the below description also could be scaled by q into a further convenient form ouo-n/d-yoy&#qt = ou uo-n/d-oy&#zq, where for abbreviation y = x(n/d), but then the circumradius and given heights too had to be rescaled accordingly for sure. Thereby the u-edges then would qualify as those pseudo edges.
Incidence matrix according to Dynkin symbol
oqo-n/d-coc&#xt → both heights = 1/sqrt(2) = 0.707107 c = x(n/d)/x(4) = sqrt(2) cos(π d/n) o..-n/d-o.. | n * * | 2 2 0 0 | 1 2 1 0 0 .o.-n/d-.o. | * n * | 0 2 2 0 | 0 1 2 1 0 ..o-n/d-..o | * * n | 0 0 2 2 | 0 0 1 2 1 ----------------+-------+-----------+---------- ... c.. | 2 0 0 | n * * * | 1 1 0 0 0 c oo.-n/d-oo.&#x | 1 1 0 | * 2n * * | 0 1 1 0 0 x .oo-n/d-.oo&#x | 0 1 1 | * * 2n * | 0 0 1 1 0 x ... ..c | 0 0 2 | * * * n | 0 0 0 1 1 c ----------------+-------+-----------+---------- o..-n/d-c.. | n 0 0 | n 0 0 0 | 1 * * * * c-{n/d} ... co.&#x | 2 1 0 | 1 2 0 0 | * n * * * oqo ...&#xt | 1 2 1 | 0 2 2 0 | * * n * * {4} ... .oc&#x | 0 1 2 | 0 0 2 1 | * * * n * ..o-n/d-..c | 0 0 n | 0 0 0 n | * * * * 1 c-{n/d}
or o..-n/d-o.. & | 2n * | 2 2 | 1 2 1 .o.-n/d-.o. | * n | 0 4 | 0 2 2 ------------------+------+-------+------- ... c.. & | 2 0 | 2n * | 1 1 0 c oo.-n/d-oo.&#x & | 1 1 | * 4n | 0 1 1 x ------------------+------+-------+------- o..-n/d-c.. & | n 0 | 3 0 | 2 * * c-{n/d} ... co.&#x & | 2 1 | 1 2 | * 2n * oqo ...&#xt | 2 2 | 0 4 | * * n {4}
oq qo-n/d-oc&#zx → height = 0, c = x(n/d)/x(4) = sqrt(2) cos(π d/n) (tegum sum of q-{n/d} and gyrated (q,c)-n/d-p) o. o.-n/d-o. | n * | 4 0 | 2 2 0 .o .o-n/d-.o | * 2n | 2 2 | 1 2 1 -----------------+------+-------+------- oo oo-n/d-oo&#x | 1 1 | 4n * | 1 1 0 x .. .. .c | 0 2 | * 2n | 0 1 1 c -----------------+------+-------+------- oq qo ..&#zx | 2 2 | 4 0 | n * * {4} .. .. oc&#x | 1 2 | 2 1 | * 2n * .. .o-n/d-.c | 0 3 | 0 3 | * * 2 c-{n/d}
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