■DE群多面体の面数公式(その323)
221の三対性は
[1]221
(27,216,720,1080,216α4+432α4,72(α5)+27(β5))
[2]221
(27,216,720,1080,216α4+432α4,72(α5)+27(β5))
[3]122
(72,720,2160,2160,432α4+270β4,27hγ5+27hγ5)
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121の三対性は
[1]121
(16,80,160,40α3+80α3,16α4+10β4)
[2]121
(16,80,160,40α3+80α3,16α4+10β4)
[3]211=β5
(10,40,80,80,32α4)
(10,40,80,40α3+40α3,16α4+16α4)
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[まとめ]三対性も成り立っているようだ.
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