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The project interested me since circa 2001 ( https://mail.python.org/pipermail/python-list/2001-July/116910.html ) and I am glad it is continued. Now I'm being a bit more versed in type theory, so wou…
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I'm thinking it would be useful to add a syntactically-not-free construct to set.mm/iset.mm.
As you know, it's very common in textbooks to make statements like "where x is not free in QQQ", where "…
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This is in iset.mm.
The proof would be by induction (much like http://us2.metamath.org/ileuni/nn0suc.html ). It would be stated something like `( A e. om /\ B e. Om ) -> ( A = B \/ -. A = B )` (or …
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When two lines have the same "title" AND "year" AND "authors" keep only one (the first? the most complete?)
Below the three key in ISI and SCOPUS:
- title --> ISI = TI / Scopus = Title
- year -->…
tommv updated
3 years ago
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The page http://us2.metamath.org/ileuni/mmbiblio.html contains the text "Bibliographic Cross-Reference for the Higher-Order Logic Explorer" just above the table, and "Higher-Order Logic Explorer Page(…
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I would love to see the iset.mm documentation explain more about how to "intuitionize", including citations pointing to especially good books/papers and specific explanations of how to do it in metama…
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Section 2.1.2 on quantifiers is a little light on examples and details, particularly for the existential quantifier. This is an important and tricky topic that probably warrants some more fleshing out…
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What is the syntax for the units: one, bottom, top and zero? is it 1, bot, top, 0?
What is the syntax for orthogonal? is it (_)^?
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### Prerequisites
* [X] Put an X between the brackets on this line if you have done all of the following:
* Checked that your issue isn't already [filed](https://github.com/leanprover/lean/iss…
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I quickly brought over [many theorems that correspond to common natural deduction rules that are valid in intuitionistic logic](http://us.metamath.org/mpegif/natded.html). However, I did not bring in…