公式LOC(aijk)=LOC(a)+[v*v*(ic)+v*(jc)+(kc)]*l (l为每个元素所占单元数)
第行第列
() () ()
i(i)/+j (<=ij<=n)
()n(n+)/ ()i(i+)/ (或j(j+)/) ()i(i)/+j ()j(j)/+i (<=ij<=n)
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