PDF(939 KB)
Invariant Ф3 for line arrangements in a plane
GUO QiuMin;XUE Fei;GUO Ling;JIANG GuangFeng
Journal of Beijing University of Chemical Technology ›› 2011, Vol. 38 ›› Issue (5) : 140-143.
PDF(939 KB)
PDF(939 KB)
Invariant Ф3 for line arrangements in a plane
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