differentiability of a function造句

The latter article is about interpreting the Cauchy-Riemann equations for maps "'C "'& rarr; " B ", where " B " is a Banach algebra ( with certain restrictions ); the author calls this " multiplicative " calculus ( quotes in original ) and says it is " so-called because the differentiability of a function depends on the multiplication in $ B $ ".
It's difficult to find differentiability of a function in a sentence. 用differentiability of a function造句挺难的