Can anybody explain me what is the basic difference between theorem, lemma and corollary?
We have been using it for a long time but I never paid any attention. I am just curious to know.
Lemma is generally used to describe a “helper” fact that is used in the proof of a more significant result.
Significant results are frequently called theorems.
Short, easy results of theorems are called corollaries.
But the words aren’t exactly that set in stone.