Is there a standard way to say "Differentiable" and "Integrable" in Spanish?
How would I say that a function is differentiable or integrable?
As a former mathematician, yes.
Something is diferenciable or derivable. In Spanish, there's a distinction between those, but not in English.
diferenciable is used when talking about multivariable calculus; derivable is used when talking about single variable calculus.
As for integrable, it stays the same, namely:
Sea f una función integrable en un subconjunto de los reales.
The spelling is kept, but the pronunciation obviously changes.