# [NTG-context] Strange behavior in math mode: < and minus sign give leftarrow

Hans Hagen j.hagen at xs4all.nl
Wed Apr 10 09:53:27 CEST 2019

On 4/10/2019 9:40 AM, Mikael P. Sundqvist wrote:
> On Wed, Apr 10, 2019 at 9:21 AM Otared Kavian <otared at gmail.com> wrote:
>>
>> Hi Hans,
>>
>> While testing old documents with lmtx, I noticed that with recent versions of mkiv, as well as LuaMetaTeX, there is a strange behavior in math mode: when the characters < and - follow each other one gets \leftarrow… This is embarrassing when one writes inequalities for negative numbers.
>> So one has to separate them in order to obtain with curly braces. Can this be fixed or is it intended ?
>>
>> \starttext
>> $\alpha < -1$
>>
>> $\alpha \leftarrow 1$
>>
>> $\alpha < {-1}$
>>
>> $\alpha {<} - 1$
>> \stoptext
>>
>> Best regards: OK
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>>
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>> ___________________________________________________________________________________
>
> Hi!
>
>
> It can be switched off with
>
> \setupmathematics[
> collapsing=1,
> ]
>
> Hope it helps!
Indeed. Aditya is in charge of decisions about these defaults so if you
want it differently you need to convince him. (I'm not sure how many
users depend on it.)

Hans

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