- zsyr2k:: ORDER * UPLO * TRANS * N * K * ALPHA * A * B * BETA * C [LDA * LDB * LDC] -> F64VECTOR procedure
xSYR2K performs one of the symmetric rank 2k operations C := alpha*A*B' + beta*C or C := alpha*B'*A + beta*C.
ALPHA and BETA are scalars, A and B are N x K or K x N matrices, and C is an N x N symmetric matrix.