apeqnum – Number equations by appendix
A package (originally written for LaTeX 2.09, but will work in LaTeX 2e) to cause equation numbers in article class (style), as A1, A2, A3, ..., B1, etc.
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label and reference systems
Maybe you are interested in the following packages as well.
- seceqn: Number theorems by section
- pagereference: Labels and references in Plain TeX
- autonum: Automatic equation references
- cleveref: Intelligent cross-referencing