Stream: Archive Mirror: Isabelle Users Mailing List

Topic: [isabelle] Probability P(x in M, Q) usage


view this post on Zulip Email Gateway (Aug 22 2022 at 20:47):

From: Kawin Worrasangasilpa <kw448@cam.ac.uk>
Hi,

I recently found the syntax of ๐’ซ as

syntax
"_prob" :: "pttrn โ‡’ logic โ‡’ logic โ‡’ logic" ("('๐’ซ'((/_ in _./ _)'))")

translations
"๐’ซ(x in M. P)" => "CONST measure M {x โˆˆ CONST space M. P}"

but I could not find any well-known rules related to it (e.g.
inclusion-exclusion:[image: {\mathbb {P}}(A_{1}\cup A_{2})={\mathbb
{P}}(A_{1})+{\mathbb {P}}(A_{2})-{\mathbb {P}}(A_{1}\cap A_{2}),]), so I
would like to know if anything of that kind has been formalised or we
always need to go down to the translation form of ๐’ซ ( "CONST measure M {x
โˆˆ CONST space M. P}" ) and deal with it by using 'measure' function, hence
always proving in the set level, when it comes to proof.

Thanks,
Kawin


Last updated: Nov 21 2024 at 12:39 UTC