Hang Liao

Automatic Differentiation of Sketched Regression

Sketching for speeding up regression problems involves using a sketching matrix $S$ to quickly find the approximate solution to a linear least squares regression (LLS) problem: given $A$ of size $n \times d$, with $n \gg d$, along with $b$ of size $n \times 1$, we seek a vector $y$ with minimal regr…