IRC log for #isabelle, 2017-04-29

All times shown according to UTC.

Time Nick Message
01:16 ertes joined #isabelle
01:49 ilbot3 joined #isabelle
01:49 Topic for #isabelle is now Official channel for the Isabelle/HOL theorem prover: http://www.cl.cam.ac.uk/research/hvg/Isabelle/index.html || Now with logging: http://irclog.perlgeek.de/isabelle/
03:36 chindy ... turns out im a moron, what i wanted is the inverse implication  A > B ⟹ P ∙ A > P ∙ B, which in fact is true
17:17 chindy The AFP submission says that there are not supposed to be usage of smt... hoever there are some theories containing smt solver
17:17 chindy also is there any more or less "standard" way to transform an smt proof to a proof not using an smt solver?
17:30 larsrh chindy: there's no strict enforcement of that rule in particular
17:30 larsrh it's more of a "avoid it if possible"
17:30 larsrh you can rewrite it by calling sledgehammer with the required facts and switch on Isar mode
17:33 chindy larsrh: but it does not find an isar proof all the time, is it supposed to ?
17:43 larsrh no, not all the time
17:43 larsrh in that case you'll have to do it yourself
18:11 ertes joined #isabelle
18:34 JCaesar Oh, and: SMT is quite smart. Good luck.
20:04 chindy i've noticed
23:32 pruvisto I think isar proofs are obly generated when aingle-step proof generation fails
23:33 pruvisto also, the individual steps in the generated isar proofs can still use smt, i think
23:37 chindy is there any meaningful difference between corollary/lemma/theorem/proposition
23:57 pruvisto No.
23:57 pruvisto None at all.
23:58 pruvisto the idea is that "lemma" is some auxiliary fact and "theorem" is some important fact (e.g. the main result you want to show)
23:58 pruvisto and "corollary" is something that follows immediately from some previous fact with little no no further effort
23:58 pruvisto not sure what "proposition" is
23:58 pruvisto but in practice, few people really make this distinction in Isabelle
23:58 pruvisto I sometimes call important stuff "theorem" when I remember to do it
23:59 pruvisto but that's about it
23:59 chindy I see :)