Complex sentence: He is well known for his works on probability, but in the computer science and algorithms he's mostly recognized because of his algorithm for matrix multiplication that's still one of the main methods that outperforms the general matrix multiplication algorithm.
Split into simpler sentences: He is well-known for his works on probability, but in the computer science, he is mostly recognized because of his algorithm for matrix multiplication. It's still one of the main methods that outperforms the general matrix multiplication algorithm.