Friedrich Goerisch
Friedrich Goerisch (born May 10, 1949 - May 18, 1995 ) was a German mathematician and university professor.
After graduating from the Old High School in Oldenburg in 1967, he first started studying chemistry at the Clausthal University of Technology, but then soon switched to mathematics. In 1978 he did his doctorate in mathematics at the TU Clausthal under Julius Albrecht . After the friendship with him, Dolly Margareth Lehmann, wife of the Dresden computer scientist Nikolaus Joachim Lehmann , advised him not to postpone the submission of the habilitation thesis, the habilitation followed in 1986 with the topic: Eigenvalue barriers and complementary extremal principles . Friedrich Goerisch was Professor and Managing Director of the Institute for Applied Mathematics at the TU Braunschweig until his death . In 1995 he died suddenly and unexpectedly after a short illness.
With the method named after him ( Lehmann-Goerisch method , also Goerisch method and Goerisch method), Friedrich Goerisch reviewed the work of Rayleigh , Walter Ritz ( Rayleigh-Ritz principle ) and Nikolaus Joachim Lehmann on the introduction of lower eigenvalues in the Treatment of partial differential equations expanded and numerical mathematics given new important impulses. A large number of his own scientific publications testify to this, including the large number of citations of his work in other scientific publications.
Many works after 1995 are dedicated to Friedrich Goerisch in memoriam. His former colleague Karl-Joachim Wirths , dean of the mathematics department at the TU Braunschweig from 1993 to 1995, classifies Friedrich Goerisch as an important German mathematician who has immortalized himself in the mathematical world with the Goerisch method.
Fonts
- Further development of methods for calculating eigenvalue barriers. Clausthal University of Technology, Faculty of Natural Sciences and Humanities, dissertation, 1978.
- Eigenvalue bounds and complementary extremal principles. Clausthal University of Technology, Habil.-Schr., 1986.
- with Julius Albrecht: Uniform derivation of inclusion sentences, in: J. Albrecht, L. Collatz, W. Velte (Eds.), Numerical Treatment of Eigenvalue Problems , Volume 3, ISNM Volume 69, Birkhäuser 1983, pp. 58-88.
- with Julius Albrecht: Templesche coefficient , journal for applied mathematics and mechanics, Volume 64, 1984, pp. T 278 – T 279.
- with Julius Albrecht: Lower bounds for the eigenvalues Stekloff's eigenvalue problems , in: Michal Gregus (Hrsg.), Equadiff 5, Bratislava 1981, Teubner 1982, digitized .
- with H. Haunhorst: eigenvalue barriers for eigenvalue problems with partial differential equations , journal for applied mathematics and mechanics, volume 65, 1985, pp. 129–135.
- with S. Zimmermann: On Trefftz ’s method and its application to eigenvalue problems , Journal for Applied Mathematics and Mechanics, Volume 66, 1986, T 304 – T 306.
- with Christopher Beattie: Methods for computing lower bounds to eigenvalues of self-adjoint operators , Numerische Mathematik, Volume 72, 1995, pp. 143-172.
Individual evidence
- ^ Dolly Margareth Lehmann: The IT pioneer Nikolaus Joachim Lehmann: Pictures of life (= German university writings . Volume 1220 ). Hänsel-Hohenhausen, Frankfurt am Main 2002, ISBN 3-8267-1220-X , p. 393 ( limited preview in Google Book search).
- ↑ Christopher Beattie: Harmonic Ritz and Lehmann Bounds. Electronic Transactions on Numerical Analysis. Volume 7, 1998, pp. 18–39, here p. 31, PDF ( Memento from October 23, 2014 in the Internet Archive ). The work is dedicated to Goerisch.
| personal data | |
|---|---|
| SURNAME | Goerisch, Friedrich |
| BRIEF DESCRIPTION | German mathematician and university professor |
| DATE OF BIRTH | May 10, 1949 |
| DATE OF DEATH | May 18, 1995 |