Higginson's Theorem is a result in the field of mathematics, specifically in the study of topology. It provides a criterion for determining when a certain type of space, known as a topological space, can be represented as a union of simpler spaces. This theorem is particularly useful in understanding the properties of complex spaces by breaking them down into more manageable components. The theorem is named after Thomas Higginson, who contributed to the development of these concepts. By applying Higginson's Theorem, mathematicians can analyze the structure of spaces and their relationships, aiding in various applications across different areas of mathematics and science.