Strange math error (bug ??)

Strange math error (bug ??)

[WN]

Hello,

The following is quit strange, in the first formula the [{Q}, {R} ] on the
left hand side of the \rightarrow is not processed but on the right hand 
side of
the \rightarrow it is processed (?)

\starttext
The left side with $[Q,R]$ does not show, but the
right side with $[Q,R]$ does show, what is happening here ???
\startformula
[ {Q} , {R} ] \rightarrow \frac{1}{i \hslash} [ {Q} , {R} ]
\stopformula
\stoptext

Kind regards
Wim

Re: Strange math error (bug ??)

[Aditya Mahajan]

On Fri, 25 Aug 2006, WN wrote:

> Hello,
>
> The following is quit strange, in the first formula the [{Q}, {R} ] on the
> left hand side of the \rightarrow is not processed but on the right hand
> side of
> the \rightarrow it is processed (?)
>
> \starttext
> The left side with $[Q,R]$ does not show, but the
> right side with $[Q,R]$ does show, what is happening here ???
> \startformula

\relax

> [ {Q} , {R} ] \rightarrow \frac{1}{i \hslash} [ {Q} , {R} ]
> \stopformula
> \stoptext

\startformula, like most commands in context, accepts an optional 
argument, so [...] immediately after \startformula is gobbled. Just 
add a \relax after \startformula and you should be fine.

Aditya

Re: Strange math error (bug ??)

[Mojca Miklavec]

On 8/25/06, WN wrote:
> Hello,
>
> The following is quit strange, in the first formula the [{Q}, {R} ] on the
> left hand side of the \rightarrow is not processed but on the right hand
> side of
> the \rightarrow it is processed (?)
>
> \starttext
> The left side with $[Q,R]$ does not show, but the
> right side with $[Q,R]$ does show, what is happening here ???
> \startformula
> [ {Q} , {R} ] \rightarrow \frac{1}{i \hslash} [ {Q} , {R} ]
> \stopformula
> \stoptext

Not a bug, but a price that you have to pay for having optional
parameters. Adding \relax after \startformula solves the problem.

Mojca

Re: Strange math error (bug ??)

[WN]

adityam@umich.edu wrote:
> On Fri, 25 Aug 2006, WN wrote:
>
>   
>> Hello,
>>
>> The following is quit strange, in the first formula the [{Q}, {R} ] on the
>> left hand side of the \rightarrow is not processed but on the right hand
>> side of
>> the \rightarrow it is processed (?)
>>
>> \starttext
>> The left side with $[Q,R]$ does not show, but the
>> right side with $[Q,R]$ does show, what is happening here ???
>> \startformula
>>     
>
> \relax
>
>   
>> [ {Q} , {R} ] \rightarrow \frac{1}{i \hslash} [ {Q} , {R} ]
>> \stopformula
>> \stoptext
>>     
Should have seen this coming. Thanks.
> \startformula, like most commands in context, accepts an optional 
> argument, so [...] immediately after \startformula is gobbled. Just 
> add a \relax after \startformula and you should be fine.
>
> Aditya
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