Re: eqalignno failin

Re: eqalignno failin

[Meer, Hans van der]

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I had this code:

99     \placeformula\startformula
100     \eqalignno{
101 >>  H(I,J) &= H(I) + H(J|I)\qquad&\hbox{\ineq[eq:equivoc]}\cr
102     W(I,J) &= H(J) - H(J|I)\qquad&\hbox{\ineq[eq:wedinfo]}\cr
103     }
104     \stopformula

On 26 Apr 2017, at 16:38, Otared Kavian <otared@gmail.com<mailto:otared@gmail.com>> wrote:

It is better to use the construction such as:

\placeformula
\startformula
\startalign
\NC H(I,J) \NC = H(I) + H(J|I) \NR[eq:equivoc]
\NC W(I,J) \NC = H(J) - H(J|I) \NR[eq:wedinfo]
\stopalign
\stopformula

Below I illustrate why this is not better, and I did not find a way how to remedy its effect.

This is the original produced by the \eqalignno. See the active links to previous equations in green, produced by my \ineq-macro.
The equation numbers here are from the 7th chapter, in the latter (shortened) examples the chapter number will be 1.
[cid:6BEAFFEE-7FE7-4CE4-AD45-DB0341A2EA25]

The suggested code gives:
[cid:CEBB66EC-83A5-4A10-A7E3-729FBBB24BD9]

Wrong because the numbers should refer to equations 1.21 and 1.28 instead of numbering forward.
Putting my \ineq-macro there
     \NC W(I,J) \NC H(J) - H(J|I)\NR\hbox{\ineq[eq:wedinfo]}
gives an equally unacceptable result:
[cid:ACE1072E-59D0-4310-8FC5-4E9E1FF3485C]



On 26 Apr 2017, at 16:38, Otared Kavian <otared@gmail.com<mailto:otared@gmail.com>> also wrote:

Hi Hans,

Since a few weeks (or months?…) ago the use of \eqno and \eqalignno has been changed in mkiv.

A remark afterwards I really regret making. But I cannot understand why \eqalignno and friends have been changed from their original behaviour. It breaks older products of mine without warning. In fact I wouldn't have spotted this, had not a colleague drawn my attention to it. Is this the only math macro behaving differently, giving a TeX error? Are there others?

I cannot but ask most strongly not to let mkiv deviate in this manner from basic TeX's behaviour. I am doing a lot in ConTeXt but I mix it with parts of basic TeX. When I can no longer trust TeX doing like TeX I really don't know how to go further. Please return the original behaviour.

Thanks for looking into it.
Hans van der Meer





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