Video Lectures

The Macrophysics and Microphysics of Cosmic Rays

October 13, 2015

Cosmic rays comprise only about one billionth of interstellar particles in the Milky Way, but have as much energy as the thermal gas. Low energy cosmic rays affect the chemistry and thermodynamics of interstellar through collisional processes...

video lecture

3-manifold groups

October 12, 2015

Ian Agol

I'll review recent progress on properties of 3-manifold groups, especially following from geometric properties. Then I'll discuss some open questions regarding 3-manifold groups, including their profinite completions, torsion in covers, orderability...

video lecture

Factors of polynomials of low individual degree

October 12, 2015

Rafael Oliveira

In [kal89], Kaltofen proved the remarkable fact that multivariate polynomial factorization can be done efficiently, in randomized polynomial time. Still, more than twenty years after Kaltofen's work, many questions remain unanswered regarding the...

video lecture

Science Talk for Families — Richard Schwartz

October 10, 2015

Richard Schwartz

Richard Schwartz, Member (2003–04) in the School of Mathematics and the Chancellor’s Professor of Mathematics at Brown University, will talk about really large numbers, as well as the different sizes of infinity and the different forms of infinite...