## Equation numbering question

### Equation numbering question

I have a document containing a SET of three equations. I want to number
them:

(3.12a), (3.12b) and (3.12c)

but I have no idea how to add the a, b and c to the automatic numbering
of the equations (I have some ideas on how to make sure the numbering
itself does not advance for two equations, using the equation counter)

Anybody have any ideas on this subject

Thanks a lot

Greetz
Kelly

### Equation numbering question

> I have a document containing a SET of three equations. I want to number
> them:

> (3.12a), (3.12b) and (3.12c)

amsmath.sty,  subeqn.sty,  or cases.sty.

Hi,

I'm trying to number everything in my document continuously by section, so
that for instance, equation 2.3 is the third item (theorem, equation, lemma,
whatever) in the second section. What I have now is using the theorem.sty
package to define theorems as:
\newtheorem{theorem}[equation]{Theorem.}[section]
in the preamble. This shares the counter, but LaTeX is still numbering by
chapter (so 2.3 is the third item in the second chapter). Does anyone know
how I can change it to numbering by section?

Also, I'd like to change the formatting of the equation numbers to not have
parentheses. So for example, it should be displayed as:
1+1=2                1.2

Let me know if you have any ideas.

Cheers,

- Emmanuel