Herbert Robert Stahl
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Herbert Robert Stahl | |
|---|---|
| Born | 3 August 1943 Fehl-Ritzhausen, Hesse-Nassau, Germany (German Empire) |
| Died | 22 April 2013 (aged 70) Berlin, Land Berlin, Germany |
He was a mathematician who solved in 2011 the Bessis-Moussa-Villani (BMV) conjecture by Daniel Bessis, Pierre Moussa, and Marcel Villani.[1] concerning Laplace transforms for special matrix functions.[2]. Since then this result is known as Stahl's theorem. Its application is mainly in mathematical physics and high-energy physics.
Before his university education, after working at AEG in 1958–1964, he became a sailor for a short time. His undergraduate, graduate, and postgraduate studies were all done at the Technical University of Berlin (TUB) in the period 1965–1974. His Ph.D. (Dr. rer. nat.) dissertation in 1974, written under the supervision of Christian Pommerenke, was titled “Contributions to the convergence problem of Pade approximants”. Eventually he became an expert on Pade approximation, but his interest was wider, it included function theory, complex approximation, rational approximation, approximation with varying weights, and orthogonal polynomials.[3]
References
- ↑ Bessis, D.; Moussa, P.; Villani, M. (1975). "Monotonic converging variational approximations to the functional integrals in quantum statistical mechanics". Journal of Mathematical Physics. 16 (11): 2318–2325. doi:10.1063/1.522463.
- ↑ Stahl, Herbert R. (2013). "Proof of the BMV conjecture". Acta Mathematica. 211 (2): 255–290. doi:10.1007/s11511-013-0104-z.
- ↑ In memoriam Herbert Stahl
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