■サマーヴィルの等面四面体(その39)
[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]
=−r32[r13,r14]+r33[r12,r14]ex
[r23,r24] [r22,r24]
+r31[r13,r14]−r33[r11,r14]ey
[r23,r24] [r21,r24]
−r31[r12,r14]+r32[r11,r14]ey
[r22,r24] [r21,r24]
+r31[r12,r13]−r32[r11,r13]+r33[r11,r12]ew
[r22,r23] [r21,r23] [r21,r22]
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