■サマーヴィルの等面四面体(その38)
r11=c1−1
r12=(4c2/3+c1/3)3/√3
r13=(c2+c1/4)4/√6
r14=c1√10/2
r21=s1
r22=(2s2/3−s1/3)3/√3
r23=−(s2+s1/4)4/√6
r24=−s1√10/2
[ex ,ey ,ez ,ew ]
[r11,r12,r13,r14]
[r21,r22,r23,r24]
[r31,r32,r33,0 ]
[r12,r13,r14]ex −[r11,r13,r14]ex
[r22,r23,r24] [r21,r23,r24]
[r32,r33,0 ] [r31,r33,0 ]
[r11,r12,r14]ez −[r11,r12,r13]ew
[r21,r22,r24] [r21,r22,r23]
[r31,r32,0 ] [r31,r32,r33]
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[r31]=[ex ,ey ,ez ]
[r32] [r11,r12,r13]
[r33] [r21,r22,r23]
=
[r12,r13]ex −[r11,r13]ey +[r11,r12]ez
[r22,r23] [r21,r23] [r21,r22]
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