Acronym | ratricu |
Name |
retrograde trigonal cupola, 3/2-cupola |
Circumradius | 1/sqrt(2) = 0.707107 |
Vertex figure | [3/2,4,3,4] + [3,4,6/2] |
General of army | oct |
Colonel of regiment | oct |
Face vector | 9, 15, 8 |
Confer |
|
The corresponding 3/2-cuploid, i.e. withdrawing the exceptional Grünbaumian bottom base (by identification of the pairwise coincident bottom edges), would be better known as tetrahemitetrahedron.
Incidence matrix according to Dynkin symbol
xx3/2ox&#x → height = sqrt(2/3) = 0.816497
({3} || dual {6/2})
o.3/2o. | 3 * | 2 2 0 0 | 1 2 1 0
.o3/2.o | * 6 | 0 1 1 1 | 0 1 1 1
-----------+-----+---------+--------
x. .. | 2 0 | 3 * * * | 1 1 0 0
oo3/2oo&#x | 1 1 | * 6 * * | 0 1 1 0
.x .. | 0 2 | * * 3 * | 0 1 0 1
.. .x | 0 2 | * * * 3 | 0 0 1 1
-----------+-----+---------+--------
x.3/2o. | 3 0 | 3 0 0 0 | 1 * * *
xx ..&#x | 2 2 | 1 2 1 0 | * 3 * *
.. ox&#x | 1 2 | 0 2 0 1 | * * 3 *
.x3/2.x | 0 6 | 0 0 3 3 | * * * 1
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