👉 Forgotten math refers to mathematical concepts and techniques that were once widely used but have since fallen out of mainstream education or practical application, often overshadowed by more dominant fields like calculus and linear algebra. These include areas such as combinatorics, number theory beyond basic arithmetic, and geometric transformations in higher dimensions. For example, combinatorial identities, like the Vandermonde identity, and properties of modular forms in number theory were once fundamental but are now less emphasized. Similarly, advanced geometric concepts like projective geometry and the study of higher-dimensional spaces were once crucial but are now often considered specialized. This forgotten math holds valuable insights and can enrich problem-solving approaches in various fields, from computer science to physics.
