Fast sparse matrix multiplication

最快的稀疏矩阵乘法运算，英文版LetAandBtwon£nmatricesoveraringR(e.g.,therealsortheintegers)eachcontainingatmostmnon-zeroelements.WepresentanewalgorithmthatmultipliesAandBusingO(m0:7n1:2+n2+o(1))algebraicoperations(i.e.,multiplications,additionsandsubtractions)overR.Thenaivematrixmultiplicational