I spent the day today at University of Waterloo, where I gave the Astro seminar. It was a great day! I prepared my talk on the bus from Toronto, which wasn't good from a nausea perspective! But I really find I give a better talk if I remake it from scratch before I give it. That is, old talks get stale, at least for me. So I have a brand-new talk about machine learning and data-driven models and criticisms thereof.
Before my talk, in the astro-ph discussion, and after my talk, with James Taylor (Waterloo) and with Mike Hudson (Waterloo), there were good ideas flowing about how to use galaxy morphologies and in particular galaxy granularity to determine galaxy distances and maybe also gravitational-lensing shear. This relates to photometric redshifts and also my ideas about making adversarial galaxies that don't reveal their shear via their ellipticities (or not strongly). Many other great conversations; too many to mention!
My visit ended with quality time with Dustin Lang (Perimeter), who always makes my day.
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