[mzl]

I wrote about overlapping intervals a while ago, and used what I thought was the standard math notation for closed and half-open intervals. From comments, I learned that half-open intervals are written differently in french mathematics: https://lobste.rs/s/cireck/how_check_for_overlapping_interva...

[xigoi]

We don’t talk about the French notation for intervals. Let it stay in France.

[mzl]

Yep, I agree on that. But still, interesting to see that such a "standard" thing can be so different in different dialects of mathematical notation.