A continuous strictly increasing function on an interval maps it bijectively onto an interval; its inverse is strictly increasing and continuous, and is differentiable at f(x) with derivative 1/f'(x) wherever f has a nonzero derivative at x.
In the setting of The Real Line: Standing Notation and Background for Calculus on Intervals, let be an interval containing two distinct points, let be continuous on and strictly increasing, that is, for all with , and let be the image of under .
is an interval containing two distinct points.
, read as a map , is bijective.
The inverse of this bijection is strictly increasing: for all with .
The map , read as a map , is continuous on .
Let . If is differentiable at and , then , read as a map , is differentiable at , and .
Loading…
No relations recorded yet.