Obituary

Anna Altman died on Saturday 24th July, 1999. She had been suffering from a cancer since 1993. Funeral Services were held in Warsaw in September 1999. Anna was an Assistant Professor at the Systems Research Institute of the Polish Academy of Sciences. She had a broad interest in optimization and applied mathematics. She worked on the theory and implementations of interior point methods for linear programming [7,8] and convex quadratic programming [4,5,9]. She applied these methods to solve several real­life problems [3,6]. She was also interested in the use of interior point methods in nondifferentiable optimization [1,2,10].
Anna was the editor of Advanced Modeling and Optimization - An Electronic International Journal, and served as a referee in many Polish and international journals. She was a dedicated teacher. Anna was an enthusiastic countryside walker. She used to walk tens of kilometers during the weekend. This year when the cancer weakened her she limited her walks to woods near Warsaw. Anna was dedicated to her work, family, and friends. She was a good friend I will miss.

Jacek Gondzio Systems Research Institute, Warsaw, Poland. October 17, 1999.

1. A. Altman. An application of the analytic centers to a generic nondifferntiable minimization problem. In J. Wessels and A. P. Wierzbicki, editors, User­Oriented Methodology and Techniques of Decision Analysis and Support, Proceedings of the International IIASA Workshop, Serock, Poland, 1991, pages 176-184. IIASA, Springer­Verlag, 1991.
2. A. Altman. Using ellipsoids in weighted projective algorithms for nondifferentiable optimization. In A. Karmann, K. Mosler, M. Schader, and G. Uebe, editors, Operations Research'92, pages 165-167. GMOOR, Physica­Verlag, 1993.
3. A. Altman. An application of an interior point method for problems with uncertainty. In A. Bachem, U. Derigs, M. J¨unger, and R. Schrader, editors, Operations Research'93, pages 5-7. GMOOR, Physica­Verlag, 1994.
4. A. Altman. QHOPDM ­ A higher order primal­dual method for large scale separable convex quadratic programming. European Journal of Operational Research, 87:200-202, 1995.
5. A. Altman. Higher order primal­dual interior point method for separable convex quadratic optimization. Control and Cybernetics, 25(4):761-772, 1996.
6. A. Altman, M. Amann, G. Klaassen, A. Ruszczy'nski, and W. Sch¨opp. Cost­effective sulphur emission reduction under uncertainty. European Journal of Operational Research, 90:395-412, 1996.
7. A. Altman and J. Gondzio. An efficient implementation of a higher order primal­ dual interior point method for large sparse linear programs. Archives of Control Sciences, 2 (XXXVIII)(1­2):23-40, 1993.
8. A. Altman and J. Gondzio. HOPDM ­ A higher order primal­dual method for large scale linear programming. European Journal of Operational Research, 66(1):159-160, 1993.
9. A. Altman and J. Gondzio. Regularized symmetric indefinite systems in interior point methods for linear and quadratic optimization. Optimization Methods and Software, 1999.
10. A. Altman and K. C. Kiwiel. A note on some cutting plane methods for convex fea­ sibility and minimization problems. Computational Optimization and Applications, 5:175-180, 1996.