[isabelle-dev] [isabelle] Tiny minor backward-compatible changes to IFOL

Tobias Nipkow nipkow at in.tum.de
Sun May 3 19:16:40 CEST 2020

On 03/05/2020 12:14, Lawrence Paulson wrote:
> On 3 May 2020, at 01:09, Klein, Gerwin (Data61, Kensington NSW) <Gerwin.Klein at data61.csiro.au> wrote:
>> I use ! all the time, esp for input (but not only for input). It’s just so much quicker to type.
> Agree. We can’t repurpose (!) and there’s no need.
>> As I said already privately, there should then definitely be an
>> abbreviation for entering ∃⇩≤⇩1 using autocomplete.
> I could live with that… I use abbreviations all the time.

I agree. The "∃⇩≤⇩1" notation is very natural, it was suggested on Mathoverflow 
and it corresponds to the counting quantifiers.


> Larry
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