Similar to 四角六片四角孔ねじれ正多面体
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 - 99▼-1 trends
 - 12345679
 - 数学Mathematics
 - 0.999...0.999...▲1 trends
 - 0次元Zero-dimensional space
 - 0の0乗Zero to the power of zero
 - 1次元One-dimensional space
 - 1+1
 - 1+1+1+1+…1 + 1 + 1 + 1 + ⋯
 - 1+2+3+4+…1 + 2 + 3 + 4 + ⋯
 - 1+2+4+8+…1 + 2 + 4 + 8 + ⋯
 - 1の冪根Root of unity
- 1の補数Ones' complement
 - 1−1+2−6+24−120+…1 − 1 + 2 − 6 + 24 − 120 + ⋯
 - 1−2+3−4+…1 − 2 + 3 − 4 + ⋯
 - 1−2+4−8+…1 − 2 + 4 − 8 + ⋯
 - 1/2 + 1/4 + 1/8 + 1/16 + ⋯1/2 + 1/4 + 1/8 + 1/16 + ⋯
 - 1/2 − 1/4 + 1/8 − 1/16 + ⋯1/2 − 1/4 + 1/8 − 1/16 + ⋯
 - 1/4 + 1/16 + 1/64 + 1/256 + ⋯1/4 + 1/16 + 1/64 + 1/256 + ⋯