Mathematics plays a crucial role in understanding the properties of materials in condensed matter physics by providing the necessary tools to describe and analyze complex systems. Mathematical concepts such as differential equations, linear algebra, and calculus are used to model the behavior of atoms and molecules in materials, understand the interactions between them, and predict their properties at different scales. By utilizing mathematical frameworks, physicists can develop theoretical models, perform simulations, and make predictions about the behavior of materials under various conditions, leading to advancements in material science and technology.