Draft:François Jaeger

François Jaeger was a French mathematician, working in graph theory, matroid theory, and knot theory.

Work
Initially, most of his research themes had as their main subject graphs, hypergraphs and matroids, and were linked to famous and difficult problems in Graph coloring and nowhere-zero flows, such as the Four color theorem, the Strong perfect graph theorem, and Tutte's 3-flow, 4-flow , and 5-flow conjectures. Gradually the research themes of François Jaeger became more and more linked to algebra and topology, to knot theory, with also an interest in statistical physics and computational complexity.

François Jaeger is known for a number of conjectures in graph theory (see for instance the Petersen coloring conjecture) and linear algebra. In addition to his research work, he wrote several surveys on various topics, including the Cycle double cover conjecture, link invariants , and nowhere-zero flows.

Honours
A year after his death, his colleagues organized a symposium in his memory in Grenoble, attended by international experts in graph theory, combinatorial optimization, matroid theory, and knot theory, including Claude Berge, Jack Edmonds, Vaughan Jones, Alexander Schrijver, Paul Seymour, William Tutte, and Dominic Welsh. A special volume of the Annales de l'Institut Fourier was published in his honor. A volume of the Banach Center Publications (Polish Academy of Sciences) was also dedicated to his memory.