Yes but that doesn't mean that the concepts aren't related. You can't copyright a formula. If I write pi = C/D who do I give credit to? Formulas represent essential truths and so they don't belong to anyone. (sure, some equations are of such a revelation to science that we often pay homage by attaching the discover's name to them, such as Pythagorus still getting credit for a2 + b2 = c2, but you can use that formula in any post you want and not be required to give ol Pythagorus credit for it) Which is why you can copywrite the words that describe what the formula represents, but not the formula. Probably the most common example I can think of is all the time the Lorentz transformations are used on physics sites without ever mentioning good ol Lorentz. So if I write in a post "that because E=MC^2 then xxxxxxxx" and I don't cite Einstein I'm still not guilty of plagiarism. On the other hand, if I copied a section of Einstein's book that included the explanation that led to that equation, that would be plagiarism.