TY - GEN A1 - Felgenhauer, Ursula T1 - Weak and strong optimality conditions for constrained control problems with discontinuous control T2 - Journal of Optimization Theory and Applications Y1 - 2001 SN - 0022-3239 VL - 2 IS - 110 SP - 361 EP - 387 ER - TY - GEN A1 - Felgenhauer, Ursula T1 - Structural properties and approximation of optimal controls Y1 - 2001 SN - 0362-546X VL - 47 IS - 3 SP - 1869 EP - 1880 ER - TY - GEN A1 - Felgenhauer, Ursula T1 - On smoothness properties and approximability of optimal control functions T2 - Annals of Operations Research Y1 - 2001 SN - 0254-5330 SN - 1572-9338 VL - 101 IS - 1 SP - 23 EP - 42 ER - TY - CHAP A1 - Felgenhauer, Ursula T1 - Numerical optimality test for control problems T2 - Proceedings of the International Conference on Parametric Optimization and Related Topics IV, Enschede (NL), June 6 - 9 1995 Y1 - 1997 SN - 3-631-49769-5 SP - 85 EP - 101 PB - Lang CY - Frankfurt am Main ER - TY - GEN A1 - Felgenhauer, Ursula A1 - Wagner, Marcus T1 - Essential properties of L∞-functions T2 - Zeitschrift für Analysis und ihre Anwendungen Y1 - 1998 SN - 0232-2064 VL - 17 IS - 1 SP - 229 EP - 242 ER - TY - CHAP A1 - Felgenhauer, Ursula T1 - A discretization for control problems with optimality test T2 - Variational calculus, optimal control and applications, International Conference in Honour of L. Bittner and R. Klötzler, Trassenheide, Germany, September 23 - 27, 1996 Y1 - 1998 SN - 3-7643-5906-4 SP - 41 EP - 52 PB - Birkhäuser CY - Basel [u.a.] ER - TY - CHAP A1 - Felgenhauer, Ursula T1 - On Ritz type discretizations for optimal control problems T2 - Systems modelling and optimization, proceedings of the 18th IFIP TC7 Conference on Systems Modelling and Optimization, held at the Westin Hotel in Detroit, Michigan, July 22 - 25, 1997 Y1 - 1999 SN - 0-8493-0607-8 SP - 91 EP - 99 PB - Chapman & Hall/CRC CY - Boca Raton, Fla. [u.a.] ER - TY - GEN A1 - Felgenhauer, Ursula T1 - Regularity properties of optimal controls with application to discrete approximation T2 - Journal of Optimization Theory and Applications Y1 - 1999 SN - 0022-3239 VL - 102 IS - 1 SP - 97 EP - 110 ER - TY - CHAP A1 - Felgenhauer, Ursula T1 - Directional sensitivity differentials for parametric bang-bang control problems Y1 - 2010 ER - TY - GEN A1 - Felgenhauer, Ursula A1 - Poggiolini, Laura A1 - Stefani, Gianna T1 - Optimality and stability result for bang-bang optimal controls with simple and double switch behaviour Y1 - 2009 ER - TY - GEN A1 - Felgenhauer, Ursula T1 - The shooting approach in analyzing bang-bang extremals with simultaneous control switches T2 - Control and Cybernetics Y1 - 2008 SN - 0324-8569 VL - 37 IS - 2 SP - 307 EP - 327 ER -