more writing; binary stars

Today I spent more time writing linear algebra and likelihood-function math and discussion into the paper with Bonaca (Harvard). I like to write first, and code later, so that the paper and the code use the same terminology and embody the same concepts.

Later in the day I had the first of regular meetings with new arrival Katie Breivik (Flatiron). We discussed the overlap between her interests in binary-star evolution and our binary-star-relevant data sets.