PPT Slide
matrix_of_b(i, j) := b(i, k)
matrix_of_c(i, j) := c(k, j)
temp (i, j) := temp(i, j) +
matrix_of_b(i, j) x matrix_of_c(i, j)
2. Use broadcast communication.
Let matrix_of_b(i,j) = b(i,k) be a broadcast operator where each element of matrix_of_b(i,j) receives value of b(i,k).