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image by Nathan Dumlao on Unsplash depicting diversity
Tuesday, June 23, 2020 2:30 pm - 4:00 pm EDT (GMT -04:00)

Unconscious Bias: How to Recognize and Interrupt It

Please join Women in Computer Science for this free, virtual event with Kathleen Nalty, an expert in strategies to create cultures of inclusion to retain and advance diverse talent.

image by Nathan Dumlao on Unsplash depicting diversity

Wednesday, July 8, 2020 3:00 pm - 3:00 pm EDT (GMT -04:00)

PhD Seminar • Symbolic Computation — Fast Computation of the Smith Form of a Nonsingular Integer Matrix

Please note: This PhD seminar will be given online.

Stavros Birmpilis, PhD candidate
David R. Cheriton School of Computer Science

Any nonsingular matrix $A \in \mathbb{Z}^{n\times n}$ is unimodularly equivalent to a unique diagonal matrix $S = diag(s_1, s_2, \ldots, s_n)$ in Smith form. The diagonal entries, the invariant factors of $A$, are positive with $s_1 \mid s_2 \mid \cdots \mid s_n$, and unimodularly equivalent means that there exist unimodular (with determinant ±1) matrices $U, V \in \mathbb{Z}^{n\times n}$ such that $UAV = S$.