In physics, a singularity refers to a point in space-time where certain quantities become infinite or undefined. This often occurs in the context of black holes, where the gravitational pull is so strong that not even light can escape. At the center of a black hole, known as the singularity, the laws of physics as we know them break down. In mathematics, a singularity can describe a point where a function ceases to be well-behaved, such as becoming infinite or discontinuous. These points are crucial in various fields, including calculus and complex analysis, as they can indicate important changes in the behavior of functions or systems.