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Henry Cohn's random mathematical thoughts

This web page is intended as a convenient place to keep short expositions, answers to questions, commentary and discussion, etc. What I put here is often less polished than my publications, and may lack detail. My publications should be regarded as my definitive opinions on their subjects, as of the time they were written, whereas these are just off the cuff remarks.

I'm definitely interested in hearing from people who read this (my contact information is on my home page). There are just a few things to keep in mind.