Portrait of Professor Klaus Schmitt

Klaus Schmitt (born 1940 in Rimbach/Odenwald, Germany) is an American mathematician doing research in nonlinear differential equations, and nonlinear analysis.

Schmitt completed the Abitur at Rimbach's Martin-Luther-Schule in 1960. He received a BA in mathematics and physics from St. Olaf College in 1962, an MA (1964) and PhD in mathematics from the University of Nebraska in 1967. He began his 43-year career at the University of Utah in 1967, first as assistant, then associate, then as full professor of mathematics. He also served as chairman of the department of mathematics from 1989 to 1992.

Schmitt served short-term appointments as visiting professor at the University of Würzburg,  University of Karlsruhe, University of Stuttgart, University Catholique de Louvain, University of Bremen, Technical University of Berlin, University of Heidelberg, University of Kaiserslautern, University of Sydney, Universidad de Chile, Universidad Catolica de Chile, National Chengchi University in Taiwan, National Tsing Hua University in Taiwan and the Chern Institute of Mathematics in Tianjin, China.

He has served as professor emeritus of mathematics at the University of Utah since 2010.

Schmitt was awarded the Humboldt Prize in mathematics in 1978 and was honored as a University of Nebraska Distinguished Alumnus in 2000.

Selected publications

  1. Boundary value problems for quasilinear elliptic partial differential equations, Nonl. Anal., 2(1978), 263-309.[1]
  2. Nonlinear elliptic boundary value problems versus their finite difference approximations: Numerically irrelevant solutions (with H.O. Peitgen and D. Saupe), J. Reine Angew. Mathematik, 322(1981), 74-117.[2]
  3. Global analysis of elliptic two parameter eigenvalue problems (with H.O. Peitgen), Trans. Amer. Math. Soc., 283(1984), 57-95.[3]
  4. Global aspects of the discrete and continuous Newton method: A case study (with H.O. Peitgen and M. Prüfer), Acta Appl. Math., 13(l988), 123-202.[4]
  5. On positive solutions of semilinear elliptic equations (with E.N. Dancer), Proc. Amer. Math. Soc., 101(1987), 445-452.[5]
  6. Permanence and dynamics in biological systems (with V. Hutson), Math. Biosciences, 111(1992), 1-71.[6]
  7. Landesman-Lazer type problems at an eigenvalue of odd multiplicity (with J. Mawhin), Results in Math. 14 (1988), 138-146.[7]
  8. Positive solutions and conjugate points for systems of differential equations (with H. Smith), Nonlinear Analysis: Theory, Methods & Applications, 2 (1978), 93-105.[8]
  9. Asymptotic behavior of positive solution branches of semilinear elliptic problems with linear part at resonance (with R. Schaaf), Z. Angew. Mathematik und Physik, 43(1992), 645-676.[9]
  10. Minimization problems for noncoercive functionals subject to constraints (with V. K. Le), Trans. Amer. Math. Soc., 347(1995), 4485-4513.[10]
  11. Global Bifurcation in Variational Inequalities: Applications to Obstacle and Unilateral Problems (with L. K. Vy), vol 123, Applied Math. Sciences, Springer Verlag, New York, 1997.[11]
  12. Mountain pass type solutions of quasilinear elliptic equations (with P. Clément, M. García-Huidobro, and R. Manásevich), Calculus of Variations and PDE, 11(2000), 33-62.[12]
  13. On the existence of soliton solutions to quasilinear Schrödinger equations (with M. Poppenberg and Z. Wang), Calculus of Variations and PDE, 14(2002), 329–344.[13]
  14. The Liouville-Bratu-Gelfand problem for radial operators (with J. Jacobsen), J. Differential Equations, 184(2002), 283–298.[14]
  15. On principal eigenvalues for quasilinear elliptic differential operators: an Orlicz-Sobolev space setting (with M. García-Huidobro, V. Le, R. Manásevich), Nonlinear Differential Equations and Applications 6 (1999), 207–225.[15]
  16. Radial solutions of quasilinear elliptic equations (with J. Jacobsen), pp. 359–435 in Handbook on Differential Equations, Canada, Drabek, Fonda, editors. Elsevier, Amsterdam, 2004.[16]

References

  1. ↑ Schmitt, Klaus (1978-03-27). "Boundary value problems for quasilinear second order elliptic equations". Nonlinear Analysis: Theory, Methods & Applications. 2 (3): 263–309. doi:10.1016/0362-546X(78)90019-6. ISSN 0362-546X.
  2. ↑ Saupe, D.; Peitgen, H. O.; Schmitt, K. (1981-01-01). "Nonlinear elliptic boundary value problems versus their finite difference approximations: numerically irrelevant solutions". Journal für die reine und angewandte Mathematik (Crelle's Journal) (in German). 1981 (322): 74–117. doi:10.1515/crll.1981.322.74. ISSN 1435-5345. S2CID 7587627.
  3. ↑ Peitgen, H.-O.; Schmitt, K. (1984). "Global analysis of two-parameter elliptic eigenvalue problems". Transactions of the American Mathematical Society. 283 (1): 57–95. doi:10.1090/S0002-9947-1984-0735409-5. ISSN 0002-9947.
  4. ↑ Peitgen, H.-O.; Prüfer, M.; Schmitt, K. (1989), Peitgen, Heinz-Otto (ed.), "Global Aspects of the Continuous and Discrete Newton Method: A Case Study", Newton’s Method and Dynamical Systems, Dordrecht: Springer Netherlands, pp. 123–202, doi:10.1007/978-94-009-2281-5_4, ISBN 978-94-009-2281-5, S2CID 122092408, retrieved 2022-10-02
  5. ↑ Dancer, E. N.; Schmitt, Klaus (1987). "On positive solutions of semilinear elliptic equations". Proceedings of the American Mathematical Society. 101 (3): 445–452. doi:10.1090/S0002-9939-1987-0908646-2. ISSN 0002-9939.
  6. ↑ Hutson, Vivian; Schmitt, Klaus (1992-09-01). "Permanence and the dynamics of biological systems". Mathematical Biosciences. 111 (1): 1–71. doi:10.1016/0025-5564(92)90078-B. ISSN 0025-5564. PMID 1515736.
  7. ↑ Mawhin, Jean; Schmitt, Klaus (1988-08-01). "Landesman-Lazer Type Problems At An Eigenvalue Of Odd Multiplicity". Results in Mathematics. 14 (1): 138–146. doi:10.1007/BF03323221. ISSN 1420-9012. S2CID 16824406.
  8. ↑ Schmitt, K.; Smith, H. L. (1978-01-01). "Positive solutions and conjugate points for systems of differential equations". Nonlinear Analysis: Theory, Methods & Applications. 2 (1): 93–105. doi:10.1016/0362-546X(78)90045-7. ISSN 0362-546X.
  9. ↑ Schaaf, Renate; Schmitt, Klaus (1992-07-01). "Asymptotic behavior of positive solution branches of elliptic problems with linear part at resonance". Zeitschrift für Angewandte Mathematik und Physik. 43 (4): 645–676. doi:10.1007/BF00946255. ISSN 1420-9039. S2CID 121195974.
  10. ↑ Vy, Khoi Le; Schmitt, Klaus (1995). "Minimization problems for noncoercive functionals subject to constraints". Transactions of the American Mathematical Society. 347 (11): 4485–4513. doi:10.1090/S0002-9947-1995-1316854-3. ISSN 0002-9947. S2CID 54078118.
  11. ↑ Le, Vy Khoi; Schmitt, Klaus (1997). Global Bifurcation in Variational Inequalities. Applied Mathematical Sciences. Vol. 123. New York, NY: Springer New York. doi:10.1007/978-1-4612-1820-3. ISBN 978-1-4612-7298-4.
  12. ↑ Clément, Ph.; García-Huidobro, M.; Manásevich, R.; Schmitt, K. (2000-08-01). "Mountain pass type solutions for quasilinear elliptic equations". Calculus of Variations and Partial Differential Equations. 11 (1): 33–62. doi:10.1007/s005260050002. ISSN 1432-0835. S2CID 119809153.
  13. ↑ Poppenberg, Markus; Schmitt, Klaus; Wang, Zhi-Qiang (2002-04-01). "On the existence of soliton solutions to quasilinear Schrödinger equations". Calculus of Variations and Partial Differential Equations. 14 (3): 329–344. doi:10.1007/s005260100105. ISSN 1432-0835. S2CID 123059914.
  14. ↑ Jacobsen, Jon; Schmitt, Klaus (2002-09-01). "The Liouville–Bratu–Gelfand Problem for Radial Operators". Journal of Differential Equations. 184 (1): 283–298. doi:10.1006/jdeq.2001.4151. ISSN 0022-0396.
  15. ↑ García-Huidobro, M.; Le, V.K.; Manásevich, R.; Schmitt, K. (1999-05-01). "On principal eigenvalues for quasilinear elliptic differential operators: an Orlicz-Sobolev space setting". Nonlinear Differential Equations and Applications. 6 (2): 207–225. doi:10.1007/s000300050073. ISSN 1420-9004. S2CID 121929946.
  16. ↑ Agarwal, R. P.; De Coster, C.; Došlý, O.; Habets, P.; Jacobsen, J.; Llibre, J.; Mawhin, J.; O'Regan, D.; Schmitt, K. (2004-01-01), Cañada, A.; Drábek, P.; Fonda, A. (eds.), List of Contributors, Handbook of Differential Equations: Ordinary Differential Equations, vol. 1, North-Holland, pp. vii, doi:10.1016/s1874-5725(00)80002-4, ISBN 9780444511287, retrieved 2022-10-02
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