Conversation

QC (in Berlin 7/29-???)
@QiaochuYuan
seeing more math on the TL recently. i haven't mathposted in a long time but i'm still happy to field math questions from twitter peeps, just reply here or tag me or w/e. big meaty philosophical questions like "wtf are real numbers anyway" would be particularly fun for me rn
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Brixton
@Brixton
With the goal of better representing the concepts themselves, or of making math more intuitive at a glance, if you could re-invent any part of standard mathematical notation, where would you start?
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QC (in Berlin 7/29-???)
@QiaochuYuan
this is not a reinvention, the idea goes back several decades, but i a, a big fan of string diagram notation for linear algebra - you won’t need it in a first course but for dealing with tensor products and duals it’s very pretty and elegant
qchu.wordpress.com
Introduction to string diagrams
Today I would like to introduce a diagrammatic notation for dealing with tensor products and multilinear maps. The basic idea for this notation appears to be due to Penrose. It has the advantage of…
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