When I studied algebra, I studied ALGEBRA. When I studied geometry, I studied GEOMETRY. But when I studied calculus, I was informed - in no uncertain terms -- the subject was THE CALCULUS. I may not know how to integrate any more, but I'm a whiz at differentiating THE use of THE definite article.
Beaman, Ralph G.
Word Ways: Vol. 5
, Article 7.
Available at: https://digitalcommons.butler.edu/wordways/vol5/iss4/7