■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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