Coordinate charts in general relativity

In general relativity, a **coordinate chart** is a mathematical construct used to describe the geometric properties of spacetime. It provides a way to assign coordinates to points in a manifold, which represents the structure of spacetime in the theory of relativity. ### Key Concepts: 1. **Manifold**: In general relativity, spacetime is modeled as a four-dimensional manifold. A manifold is a topological space that locally resembles Euclidean space, allowing the use of calculus.