[Hol-info] Proving a negative statement

I want to prove ``a <> b`` for some a,b. After stripping I am asked to prove F. I was able to use the assumptions to prove ``F = T``. At this point I thought "asm_simp_tac bool_ss []" should finish the proof but it doesn't. So "pop_assum (fn th => rewrite_tac [th]" actually finished the work for

[Hol-info] LSFA 2019 - Second Call for papers

SECOND CALL FOR PAPERS LSFA 2019 14th Workshop on Logical and Semantic Frameworks, with Applications 24-26 August 2019, Natal, Brazil https://sites.google.com/view/lsfa2019 Logical and semantic frameworks are formal languages used to represent logics, languages and systems. These frameworks

[Hol-info] SEFM 2019 - Call for Papers

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