PHD Discussions Logo

Ask, Learn and Accelerate in your PhD Research

Question Icon Post Your Answer

Question Icon

2 years ago in Algebraic Analysis , Mathematics By Trisha

If f(x) is an increasing real-valued function, what can be said about its inverse?

I'm analyzing functional transformations in my work on optimization models. The invertibility and properties of the inverse are critical for ensuring the stability of my iterative algorithms. I want to confirm the foundational theory that governs this relationship before applying it to more complex, multidimensional cases.

 

All Answers (1 Answers In All)

By Ivaan Answered 2 years ago

Based on my work with dynamical systems and optimization, I've consistently seen that if a real-valued function is strictly increasing and thus one-to-one its inverse function is also strictly increasing. This preservation of order is fundamental. I would recommend internalizing this not just as a theorem, but as an intuitive principle: the graph of an increasing function and its inverse are symmetric mirror images across the line y=x, so the "upward" trend is maintained. This property is a cornerstone for justifying the invertibility of operators in applied mathematics.

 

Your Answer