F-theory
| String theory | 
|---|
| Fundamental objects | 
| Perturbative theory | 
| Non-perturbative results | 
| Phenomenology | 
| Mathematics | 
In theoretical physics, F-theory is a branch of string theory developed by Iranian-American physicist Cumrun Vafa. The new vacua described by F-theory were discovered by Vafa and allowed string theorists to construct new realistic vacua — in the form of F-theory compactified on elliptically fibered Calabi–Yau four-folds. The letter "F" supposedly stands for "Father" in relation to "Mother"-theory.