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In the following example, `congr` fails on the term `id f a`:
```
example (a b : Nat) (f : Nat → Nat) : id f a = id f b := by
conv =>
lhs
-- | id f a
congr
-- 'congr' conv tac…
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Many WeBWork problems are not generating. Instead one of the following two errors is generated.
1. `PTX:ERROR: WeBWorK problem local/Derivatives_Theorems/TrueFalseApplyingTheorems.pg with seed 128 …
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I volunteer to update the [diagrams of the Algebraic / Topological structures](http://us.metamath.org/mpeuni/mmtopstr.html) in Metamath.
I think some new structures have been defined and may be added…
tirix updated
3 years ago
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listTheory is cluttered with stuff that has moved in over time from rich_listTheory, and depends on probably too many things (like pred_setTheory). There is arguably a "core" theory about lists, that …
xrchz updated
9 years ago
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2016/09/14, 第十一循环第一次, 总第五十期 -> @swaylq
投稿:
- [x] @at15
- [ ] @swaylq
- [ ] @arrowrowe
- [ ] @ComMouse
- [ ] @LukeXuan
- [ ] @gaocegege
- [ ] @JasonQSY
- [x] @sxjscience
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Currently two different counter aliasing macros are used
- `\newaliascnt` from package `aliascnt` which globally lets `\c@`, `\the`, `\theH` and `\p@`, and globally defines `\cl@` (to hold the `\cl@…
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I had decided to use cooltt to experiment with weak universes, i.e. universes where the decoding laws hold up to iso. These are fine, but they make certain things harder — including synthesizing motiv…
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Currently `import` truly imports everything from a module, including `private` declarations and transitively imported declarations. Thus if we make any change at all that is reflected in the .olean ou…
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Some developments of the Reals library use a wild mix between `Rsqr x` (aka `x²`) and `x^2`. the field tactic supports (afaikt) only x^2 while most of the lemmas connecting x^2 and sqrt use Rsqr. Trig…
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sorry to bother you, but how can we prove the functionality of code before and after code obfuscation?