
matrix multiplication algorithm time complexity - Stack Overflow
Jan 22, 2017 · The fastest known matrix multiplication algorithm is Coppersmith-Winograd algorithm with a complexity of O (n 2.3737). Unless the matrix is huge, these algorithms do not result in a vast …
What is the best matrix multiplication algorithm? [closed]
The best matrix multiplication algorithm is the one that someone with detailed architectural knowledge has already hand-tuned for your target platform. There are lots of good libraries that supply tuned …
Optimized matrix multiplication in C - Stack Overflow
Dec 15, 2009 · The computation complexity of multiplication of two N*N matrix is O (N^3). The performance will be dramatically improved if you use O (N^2.73) algorithm which probably has been …
Strassen's algorithm for matrix multiplication - Stack Overflow
Dec 17, 2009 · The blocks necessary to express the result of 2x2 block matrix multiplication have enough common factors to allow computing them in fewer multiplications than the original formula …
How does BLAS get such extreme performance? - Stack Overflow
Aug 20, 2009 · Given that a matrix-matrix multiplication say: nxm * mxn requires n*n*m multiplications, so in the case above 1000^3 or 1e9 operations. How is it possible on my 2.6Ghz processor for BLAS …
This (modulo 2) binary matrix multiplication algorithm seems to ...
Oct 27, 2022 · The following are two algorithms for multiplying binary matrices (i.e. taking the "dot" product) modulo 2. The first ("default") approach just uses numpy matrix-multiplication, then reduces …
Divide and Conquer Matrix Multiplication - Stack Overflow
Sep 21, 2012 · I am having trouble getting divide and conquer matrix multiplication to work. From what I understand, you split the matrices of size nxn into quadrants (each quadrant is n/2) and then you do: …
Laderman's 3x3 matrix multiplication with only 23 multiplications, is ...
May 31, 2012 · In terms of multiplication complexity, Laderman's algorithm O (n^2.854) is better than naive O (n^3) but inferior compared to Strassen's algorithm O (n^2.807). A 3x3 algorithm with 21 …
c++ - Why is Strassen matrix multiplication so much slower than ...
The basic problem is that you're recursing down to a leaf size of 1 with your strassen implementaiton. Strassen's algorithm has a better Big O complexity, but constants do matter in reality, which means …
How to speed up matrix multiplication in C++? - Stack Overflow
26 I'm performing matrix multiplication with this simple algorithm. To be more flexible I used objects for the matricies which contain dynamicly created arrays. Comparing this solution to my first one with …