Claude Berge was a prominent French mathematician known for his contributions to graph theory and combinatorial optimization. He was born on February 3, 1926, and passed away on September 27, 2021. Berge's work laid the foundation for many concepts in mathematics, particularly through his influential books and research papers. One of his notable achievements is the development of the Berge's lemma, which is essential in the study of matchings in bipartite graphs. Additionally, he contributed to the field of game theory and was involved in the creation of the Berge-Tutte theorem, which addresses perfect matchings in graphs.