for my lectures I am preparing beamer presentations.

I would like to include sections (possibly more than one in a single beamer presentation) and to be able to have continuing numbering of definitions, theorems etc in the next beamer presentations. I know how to number them in a single presentation but then in the next one the numbering begins from 1 again and I can't refer to a theorem from a previous beamer presentation.

Is there any way of doing this? Help is much appreciated