[NTG-context] math symbol for "is an element of"

[Wolfgang Schuster]

type at projectivespace.com schrieb am 05.11.2020 um 21:22:
> A quick question for the ConTeXt mailing list:
> 
> Other than typing it directly (or cutting and pasting it), how does one get
> the character ∈ (in case this gets garbled in emailing, this is supposed to
> be the mathematical symbol that looks more or less like an epsilon, and
> which is the mathematical symbol for "is an element of" a set).
> 
> \showmathfontcharacters gives the following information about it:
> 
> U+02208: ∈ ∈ element of
> width: 524262, height: 426798, depth: 33798, italic: 0
> mathclass: relation, mathname: in
> 
> I'm not completely sure how to read this information, but if I read it
> correctly, perhaps this character should be gotten with \in. Also, the Basic
> Math page of the Wiki (https://wiki.contextgarden.net/Math/basic) states
> that you should be able to type this character with "\in". But that doesn't
> work (even inside a formula), since \in is used for references in ConTeXt.
> And in fact the link on the Basic Math page for \in takes you to the
> explanation of \in as used for ConTeXt references.
> 
> This is a very common character in mathematics, so I wanted to ask: what is
> the recommended way to type this character? (I'm hoping to avoid having to
> cut and paste the character into the document every time I want to use it.
> And I don't have a utf enabled keyboard that would allow me to type this
> symbol readily from the keyboard.)

Do you have a example where \in fails?

\starttext

\m {A \in B}

\startformula
A \in B
\stopformula

\stoptext

Wolfgang