How do I make theorems and equations share numbering? The default numbering system goes like this:

Theorem 1. Blah blah blah…

1=0+1 (1)

Theorem 2. More blahs…

Theorem 3. No more blahs…

2=1+1 (2)

The numbers in the parenthesis are equation numbers. How do you change the above into this:

Theorem 1. Blah blah blah…

1=0+1 (2)

Theorem 3. More blahs…

Theorem 4. No more blahs…

2=1+1 (5)

I am using ntheorem package, but couldn't figure out how. Would I need to use a different package?

## Best Answer

You just need to tell it to number your theorems using the equation counter.

Now

`\begin{thm}`

will be numbered the same as`\begin{equation}`

.