Search Results for author: Sina Baghal

Found 2 papers, 0 papers with code

A matrix concentration inequality for products

no code implementations12 Aug 2020 Sina Baghal

We present a non-asymptotic concentration inequality for the random matrix product \begin{equation}\label{eq:Zn} Z_n = \left(I_d-\alpha X_n\right)\left(I_d-\alpha X_{n-1}\right)\cdots \left(I_d-\alpha X_1\right), \end{equation} where $\left\{X_k \right\}_{k=1}^{+\infty}$ is a sequence of bounded independent random positive semidefinite matrices with common expectation $\mathbb{E}\left[X_k\right]=\Sigma$.

A termination criterion for stochastic gradient descent for binary classification

no code implementations23 Mar 2020 Sina Baghal, Courtney Paquette, Stephen A. Vavasis

We propose a new, simple, and computationally inexpensive termination test for constant step-size stochastic gradient descent (SGD) applied to binary classification on the logistic and hinge loss with homogeneous linear predictors.

Binary Classification Classification +1

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