Acronym | 2n,2m-dip | ||||||||||||||||||||||||||||||||||||
Name | 2n-gonal - 2m-gonal duoprism | ||||||||||||||||||||||||||||||||||||
Circumradius | sqrt[1/(4 sin2(π/2n))+1/(4 sin2(π/2m))] | ||||||||||||||||||||||||||||||||||||
General of army | (is itself convex) | ||||||||||||||||||||||||||||||||||||
Colonel of regiment | (is itself locally convex) | ||||||||||||||||||||||||||||||||||||
Face vector | 4nm, 8nm, 4nm+2n+2m, 2n+2m | ||||||||||||||||||||||||||||||||||||
Especially |
4,2m-dip (n=2)
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Confer |
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External links |
Although in here n>1 and m>1 is allowed, snubbing links require n>2 and m>2 respectively in general. Nonetheless, s4o2s4o well is possible too (it even becomes a regular polychoron), it just has a different incidence structure because of degeneracies.
Incidence matrix according to Dynkin symbol
x2no x2mo (n>1,m>1) . . . . | 4nm | 2 2 | 1 4 1 | 2 2 ----------+-----+---------+-----------+------ x . . . | 2 | 4nm * | 1 2 0 | 2 1 . . x . | 2 | * 4nm | 0 2 1 | 1 2 ----------+-----+---------+-----------+------ x2no . . | 2n | 2n 0 | 2m * * | 2 0 x . x . | 4 | 2 2 | * 4nm * | 1 1 . . x2mo | 2m | 0 2m | * * 2n | 0 2 ----------+-----+---------+-----------+------ x2no x . ♦ 4n | 4n 2n | 2 2n 0 | 2m * x . x2mo ♦ 4m | 2m 4m | 0 2m 2 | * 2n snubbed forms: s-2n-o-2-s-2m-o (for n>2,m>2)
xnx x2mo (n>1,m>1) . . . . | 4nm | 1 1 2 | 1 2 2 1 | 2 1 1 ---------+-----+-------------+---------------+------- x . . . | 2 | 2nm * * | 1 2 0 0 | 2 1 0 . x . . | 2 | * 2nm * | 1 0 2 0 | 2 0 1 . . x . | 2 | * * 4nm | 0 1 1 1 | 1 1 1 ---------+-----+-------------+---------------+------- xnx . . | 2n | n n 0 | 2m * * * | 2 0 0 x . x . | 4 | 2 0 2 | * 2nm * * | 1 1 0 . x x . | 4 | 0 2 2 | * * 2nm * | 1 0 1 . . x2mo | q | 0 0 2m | * * * 2n | 0 1 1 ---------+-----+-------------+---------------+------- xnx x . ♦ 4n | 2n 2n 2n | 2 n n 0 | 2m * * x . x2mo ♦ 4m | 2m 0 4m | 0 2m 0 2 | * n * . x x2mo ♦ 4m | 0 2m 4m | 0 0 2m 2 | * * n snubbed forms: snx2s2mo (for even n>2, m>2)
xnx xmx (n>1,m>1) . . . . | 4nm | 1 1 1 1 | 1 1 1 1 1 1 | 1 1 1 1 --------+-----+-----------------+-------------------+-------- x . . . | 2 | 2nm * * * | 1 1 1 0 0 0 | 1 1 1 0 . x . . | 2 | * 2nm * * | 1 0 0 1 1 0 | 1 1 0 1 . . x . | 2 | * * 2nm * | 0 1 0 1 0 1 | 1 0 1 1 . . . x | 2 | * * * 2nm | 0 0 1 0 1 1 | 0 1 1 1 --------+-----+-----------------+-------------------+-------- xnx . . | 2n | n n 0 0 | 2m * * * * * | 1 1 0 0 x . x . | 4 | 2 0 2 0 | * nm * * * * | 1 0 1 0 x . . x | 4 | 2 0 0 2 | * * nm * * * | 0 1 1 0 . x x . | 4 | 0 2 2 0 | * * * nm * * | 1 0 0 1 . x . x | 4 | 0 2 0 2 | * * * * nm * | 0 1 0 1 . . xmx | 2m | 0 0 m m | * * * * * 2n | 0 0 1 1 --------+-----+-----------------+-------------------+-------- xnx x . ♦ 4n | 2n 2n 2n 0 | 2 n 0 n 0 0 | m * * * xnx . x ♦ 4n | 2n 2n 0 2n | 2 0 n 0 n 0 | * m * * x . xmx ♦ 4m | 2m 0 2m 2m | 0 m m 0 0 2 | * * n * . x xmx ♦ 4m | 0 2m 2m 2m | 0 0 0 m m 2 | * * * n snubbed forms: sns2sms (for n>2,m>2), sns2smx (for n>2,even m>2)
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