[tlbuild] etex serious bug

[Peter Breitenlohner]

On Fri, 20 Apr 2012, Vafa Khalighi wrote:

>> Why do you want that the displayed equation thinks the paragraph is
>> left-to-right when it is in fact right-to-left?
>>
> Thanks for the reply. This is the whole story:
>
> In Persian typography, texts are written from right to left but mathematics
> is written from left to right and equation numbers have the same meaning as
> they have in LTR. i.e. \eqno means put equation number on the right hand
> side and \leqno means put equation on the left hand side. Currently when we
> make paragraph RTL in etex, etex places  equation numbers in the opposite
> direction, i.e.  \eqno means put equation number on the left hand side and
> \leqno means put equation number on the right hand side (exactly opposite
> of what it supposed to be in Persian). So to fix this, ...

Hi Vafa,

I see. To make \eqno and \leqno have their usual meaning you could redefine
\eqno and \leqno as in the attached file.

Regards
Peter Breitenlohner <peb at mppmu.mpg.de>
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