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Jul 20, 2021 at 20:26 comment added Moishe Kohan @arsmath It's in Mnev's proof of his universality theorem. I will add a reference later. Mnev works over the reals but the argument is general.
Jul 20, 2021 at 18:18 comment added arsmath @MoisheKohan Do you know a reference for that?
Jul 19, 2021 at 23:59 comment added Moishe Kohan In principle, yes, since one can encode algebraic equations using projective line arrangements.
Jul 19, 2021 at 22:08 history asked THC CC BY-SA 4.0