# Inverse Problems of Determining Parameters of the Fractional Partial Differential Equations

## TL;DR

This paper surveys inverse problems related to identifying unknown parameters in fractional diffusion equations, which are crucial for modeling anomalous diffusion and understanding solution properties.

## Contribution

It provides a comprehensive overview of existing research on inverse problems for fractional diffusion equations, highlighting theoretical and practical developments.

## Key findings

- Inverse problems are essential for parameter identification in fractional PDEs.
- Survey covers methods and results in inverse problems for fractional diffusion.
- Highlights challenges and future directions in the field.

## Abstract

When considering fractional diffusion equation as model equation in analyzing anomalous diffusion processes, some important parameters in the model related to orders of the fractional derivatives, are often unknown and difficult to be directly measured, which requires one to discuss inverse problems of identifying these physical quantities from some indirectly observed information of solutions. Inverse problems in determining these unknown parameters of the model are not only theoretically interesting, but also necessary for finding solutions to initial-boundary value problems and studying properties of solutions. This chapter surveys works on such inverse problems for fractional diffusion equations.