1928 – 2016
Solomon Feferman (1928-2016) was an American philosopher and mathematical logician at Stanford University, renowned for his work on proof theory, predicative foundations of mathematics, and the philosophy of mathematics. He developed systems of predicative analysis and contributed significantly to our understanding of Gödel's incompleteness theorems and the foundations of mathematics.
Developed systems of predicative mathematics extending Hermann Weyl's program
Edited the collected works of Kurt Gödel (five volumes)
Advanced proof theory through work on ordinal analysis and reflection principles
Authored 'In the Light of Logic' exploring foundations of mathematics
Served as President of the Association for Symbolic Logic