Strassen’s Algorithm
[Divide and Conquer paradigm](https://texonom.com/divide-and-conquer-paradigm-9b10e85e70214b9b8f0bd293f5c297bd) 


only 8 to 7 multiplication for 2x2 multiplication so $\Theta(n^{lg7})$
$$T(n) = 7T(n/2) + \Theta(n^2)$$










