Equation alignment

Equation alignment

[Sylvain Hubert via ntg-context]

Dear List,

The following example of equation alignment copied from An Excursion
is not reproducible under my context 2021.03.05 shipped with texlive
2021:

\starttext
\startformula
\eqalign{
ax^2+bx+c &= 0 \cr
x &= \frac{-b \pm \sqrt{b^2-4ac}}{2a} \cr
}
\stopformula
\stoptext

Both ampersands are rendered literally.

Does anyone know how to properly typeset aligned equations?

Thanks!

Sylvain
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Re: Equation alignment

[Wolfgang Schuster via ntg-context]

Sylvain Hubert via ntg-context schrieb am 07.09.2021 um 14:29:
> Dear List,
>
> The following example of equation alignment copied from An Excursion
> is not reproducible under my context 2021.03.05 shipped with texlive
> 2021:
>
> \starttext
> \startformula
> \eqalign{
> ax^2+bx+c &= 0 \cr
> x &= \frac{-b \pm \sqrt{b^2-4ac}}{2a} \cr
> }
> \stopformula
> \stoptext
>
> Both ampersands are rendered literally.
>
> Does anyone know how to properly typeset aligned equations?

\starttext

\startformula
\startmathalignment%[align={right,left}]
\NC ax^2+bx+c \NC = 0                                \NR
\NC x         \NC = \frac{-b \pm \sqrt{b^2-4ac}}{2a} \NR
\stopmathalignment
\stopformula

\stoptext

Wolfgang

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Re: Equation alignment

[Jeong Dal via ntg-context]

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Dear Sylvain,

I am using ’\startalign’

> 
> \starttext
> \startformula
> \eqalign{
> ax^2+bx+c &= 0 \cr
> x &= \frac{-b \pm \sqrt{b^2-4ac}}{2a} \cr
> }
> \stopformula
> \stoptext
> 

\starttext
\startformula
\startalign
\NC ax^2 + bx + c \NC = 0 \NR
\NC x \NC = = \frac{-b \pm \sqrt{b^2-4ac}}{2a} \NR
\stopalign
\stopformula
\stoptext

There is  a nice guide book "My Way” for math-alignment by Aditya.
https://wiki.contextgarden.net/images/archive/b/b4/20100530075041!Mathalign.pdf <https://wiki.contextgarden.net/images/archive/b/b4/20100530075041!Mathalign.pdf>

Best regards,

Dalyoung


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