# How to see the words shared across topics in LDA model?

I am trying to find the words that are shared across the topics and words unique to a topic using LDA model in R. Is there any package or function?

Thanks

Of course it is customary to display TOP-$$n$$ words to quote a topic. You may ask then which words in the TOP-10 or TOP-20 are shared between some topics. I don't know how to do this in R, I'd use a hash in perl or python to achieve this goal.