Acronym | pesc (old: peppypy), K-4.86 |
Name |
pentagon scalene, pentagon-pyramidal pyramid, line atop fully orthogonal pentagon, 5 tet rosette |
Circumradius | (1+sqrt(5))/2 = 1.618034 |
Lace city in approx. ASCII-art |
o5o o5o o5x |
General of army | (is itself convex) |
Colonel of regiment | (is itself locally convex) |
Dual | (topologically selfdual, in different orientation) |
Dihedral angles | |
Face vector | 7, 16, 16, 7 |
Confer |
|
External links |
As abstract polytope pesc is isomorphic to stasc, thereby replacing pentagons by pentagrams resp. replacing peppy by stappy.
Incidence matrix according to Dynkin symbol
oox5ooo&#x → height(1,2) = 1 height(1,3) = height(2,3) = sqrt((5-sqrt(5))/10) = 0.525731 o.. o.. | 1 * * ♦ 1 5 0 0 | 5 5 0 0 | 5 1 0 .o. .o. | * 1 * ♦ 1 0 5 0 | 5 0 5 0 | 5 0 1 ..o ..o | * * 5 | 0 1 1 2 | 1 2 2 1 | 2 1 1 -----------+-------+---------+---------+------ oo.5oo.&#x | 1 1 0 | 1 * * * | 5 0 0 0 | 5 0 0 o.o5o.o&#x | 1 0 1 | * 5 * * | 1 2 0 0 | 2 1 0 .oo5.oo&#x | 0 1 1 | * * 5 * | 1 0 2 0 | 2 0 1 ..x ... | 0 0 2 | * * * 5 | 0 1 1 1 | 1 1 1 -----------+-------+---------+---------+------ ooo5ooo&#x | 1 1 1 | 1 1 1 0 | 5 * * * | 2 0 0 o.x ...&#x | 1 0 2 | 0 2 0 1 | * 5 * * | 1 1 0 .ox ...&#x | 0 1 2 | 0 0 2 1 | * * 5 * | 1 0 1 ..x5..o | 0 0 5 | 0 0 0 5 | * * * 1 | 0 1 1 -----------+-------+---------+---------+------ oox ...&#x ♦ 1 1 2 | 1 2 2 1 | 2 1 1 0 | 5 * * o.x5o.o&#x ♦ 1 0 5 | 0 5 0 5 | 0 5 0 1 | * 1 * .ox5.oo&#x ♦ 0 1 5 | 0 0 5 5 | 0 0 5 1 | * * 1
pt || peppy → height = (sqrt(5)-1)/4 = 0.309017
o.. o.. | 1 * * ♦ 1 5 0 0 | 5 5 0 0 | 5 1 0
.o. .o. | * 1 * ♦ 1 0 5 0 | 5 0 5 0 | 5 0 1
..o ..o | * * 5 | 0 1 1 2 | 1 2 2 1 | 2 1 1
-----------+-------+---------+---------+------
oo.5oo.&#x | 1 1 0 | 1 * * * | 5 0 0 0 | 5 0 0
o.o5o.o&#x | 1 0 1 | * 5 * * | 1 2 0 0 | 2 1 0
.oo5.oo&#x | 0 1 1 | * * 5 * | 1 0 2 0 | 2 0 1
..x ... | 0 0 2 | * * * 5 | 0 1 1 1 | 1 1 1
-----------+-------+---------+---------+------
ooo5ooo&#x | 1 1 1 | 1 1 1 0 | 5 * * * | 2 0 0
o.x ...&#x | 1 0 2 | 0 2 0 1 | * 5 * * | 1 1 0
.ox ...&#x | 0 1 2 | 0 0 2 1 | * * 5 * | 1 0 1
..x5..o | 0 0 5 | 0 0 0 5 | * * * 1 | 0 1 1
-----------+-------+---------+---------+------
oox ...&#x ♦ 1 1 2 | 1 2 2 1 | 2 1 1 0 | 5 * *
o.x5o.o&#x ♦ 1 0 5 | 0 5 0 5 | 0 5 0 1 | * 1 *
.ox5.oo&#x ♦ 0 1 5 | 0 0 5 5 | 0 0 5 1 | * * 1
pyramid product of line with {5} → height = sqrt[(5-2 sqrt(5))/20] = 0.162460 o.. o.. & | 2 * ♦ 1 5 0 | 5 5 0 | 5 1 ..o ..o | * 5 | 0 2 2 | 1 4 1 | 2 2 --------------+-----+--------+--------+---- oo.5oo.&#x | 2 0 | 1 * * | 5 0 0 | 5 0 o.o5o.o&#x & | 1 1 | * 10 * | 1 2 0 | 2 1 ..x ... | 0 2 | * * 5 | 0 2 1 | 1 2 --------------+-----+--------+--------+---- ooo5ooo&#x | 2 1 | 1 2 0 | 5 * * | 2 0 o.x ...&#x & | 1 2 | 0 2 1 | * 10 * | 1 1 ..x5..o | 0 5 | 0 0 5 | * * 1 | 0 2 --------------+-----+--------+--------+---- oox ...&#x ♦ 2 2 | 1 4 1 | 2 2 0 | 5 * o.x5o.o&#x & ♦ 1 5 | 0 5 5 | 0 5 1 | * 2
© 2004-2024 | top of page |