[NTG-context] Mathematical symbol of non-inclusion

[Hans Åberg]

> On 30 Aug 2020, at 11:40, Fabrice Couvreur <fabrice1.couvreur at gmail.com> wrote:
> 
> @Hans My ignorance is total : how to write symbols from the keyboard ?

I use text substitutions on MacOS: a sequence of characters can be automatically translated into another. So for example, ".subset" might translate into "⊂" as you type along. To find the ⊂ the first time, there is a Unicode symbol table. Other platforms and editors have similar features. There are other ways, but I have found this easiest and fastest both to create and use.