Hearing about so many uses of an entire area of algebra I barely know anything about, I get tensor and tensor. Ankur Moitra on "Recent Progress in High-Dimensional Learning": https://simons.berkeley.edu/talks/tbd-166 https://simons.berkeley.edu/talks/tbd-169 https://simons.berkeley.edu/talks/tbd-172 https://simons.berkeley.edu/talks/tbd-174
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"The Astonishing Power of just Sums and Products in a Semiring"
