Infinite cardinality

Infinite cardinality refers to the size of sets that contain an endless number of elements. For example, the set of all natural numbers (1, 2, 3, ...) is infinite because it goes on forever. However, not all infinite sets are the same size; some have a larger infinity than others. For instance, the set of real numbers (which includes all the decimals) is larger than the set of natural numbers. Infinite cardinality helps mathematicians understand and categorize different types of infinity, allowing them to explore complex concepts in mathematics and set theory.