Let us suppose vs Suppose [closed]
Probably there is little or no difference. Personally, I tend to use both of these indiscriminately.
The following perhaps has no basis in practice?
If the rest of the article is in first person plural ("us", "we"), continue that here and write "Let us suppose..."
If the rest of the article in the second person ("you" or just imperative), continue that here and write "Suppose..."