Andrzej Piotr Ruszczyński

Andrzej P. Ruszczyński
Ruszczyński in 2017
Nationality	American
Alma mater	Politechnika Warszawska, Warsaw, Poland
Known for	Stochastic programming, risk-averse optimization
Awards	Dantzig Prize (2018)
Scientific career
Fields	Mathematical optimization
Doctoral advisor	Jacek Szymanowski

Andrzej Piotr Ruszczyński (born July 29, 1951) is a Polish-American applied mathematician, noted for his contributions to mathematical optimization, in particular, stochastic programming and risk-averse optimization.

Schooling and positions

Ruszczyński was born and educated in Poland. In 1969 he won the XX Polish Mathematical Olympiad.[1] After graduating in 1974 with a master's degree from the Department of Electronics, Warsaw University of Technology, he joined the Institute of Automatic Control at this school. In 1977 he received his PhD degree for a dissertation on the control of large-scale systems, and in 1983 Habilitation, for a dissertation on nonlinear stochastic programming.[2] In 1992 the President of Poland, Lech Wałęsa, awarded Ruszczyński the state title of Professor. In 1984-86 Ruszczyński was a visiting scholar at the Institute for Operations Research, University of Zurich. In 1986-87 he was the vice-director of the Institute of Automatic Control, and in 1987-1990 he was the Vice-Dean of the Department of Electronics, Warsaw University of Technology.[3] In 1992 Ruszczyński was a visiting professor at the Department of Operations Research, Princeton University, in 1992-96 he led the project Optimization under Uncertainty at the International Institute for Applied Systems Analysis, in 1996-97 he was a visiting professor at the Department of Industrial Engineering, University of Wisconsin-Madison, and since 1997 he has been with Rutgers University, where he holds a position of the Board of Governors Professor at the Rutgers Business School.[4][5]

Main achievements

Ruszczyński developed decomposition methods for stochastic programming problems, the theory of stochastic dominance constraints (jointly with Darinka Dentcheva), contributed to the theory of coherent, conditional, and dynamic risk measures (jointly with Alexander Shapiro), and created the theory of Markov risk measures.[6][7][8][9][10] He authored five books and more than 100 research papers.[11]

He was elected to the 2017 class of Fellows of the Institute for Operations Research and the Management Sciences.[12] In 2018 Ruszczyński (jointly with A. Shapiro) received the Dantzig Prize[13][14] of the Society for Industrial and Applied Mathematics and the Mathematical Optimization Society.[15]

Ruszczyński led a project Optimization under Uncertainty at the International Institute for Applied Systems Analysis (pictured).

Selected books

• Ruszczyński, Andrzej; Shapiro, Alexander (2003). Stochastic Programming. Handbooks in Operations Research and Management Science. Vol. 10. Philadelphia: Elsevier. p. 700. ISBN 978-0444508546.
• Ruszczyński, Andrzej (2006). Nonlinear Optimization. Princeton, NJ: Princeton University Press. pp. xii+454. ISBN 978-0691119151. MR 2199043.
• Shapiro, Alexander; Dentcheva, Darinka; Ruszczyński, Andrzej (2009). Lectures on stochastic programming. Modeling and theory. MPS/SIAM Series on Optimization. Vol. 9. Philadelphia: Society for Industrial and Applied Mathematics. pp. xvi+436. ISBN 978-0898716870. MR 2562798.
• Dentcheva, Darinka; Ruszczyński, Andrzej (2024). Risk-Averse Optimization. Theory and Methods. Springer Series in Operations Research and Financial Engineering. Cham, Switzerland: Springer Nature. pp. xv+451. ISBN 978-3-031-57987-5.

Most influential papers

• Ruszczyński, Andrzej (1986). "A regularized decomposition method for minimizing a sum of polyhedral functions". Mathematical Programming. 35: 309–333. doi:10.1007/BF01580883.
• Mulvey, John M.; Ruszczyński, Andrzej (1995). "A new scenario decomposition method for large-scale stochastic optimization". Operations Research. 43 (3): 477–490. doi:10.1287/opre.43.3.477.
• Ogryczak, Włodzimierz; Ruszczyński, Andrzej (2002). "Dual stochastic dominance and related mean—risk models". SIAM Journal on Optimization. 13: 60–78. doi:10.1137/S1052623400375075.
• Dentcheva, Darinka; Ruszczyński, Andrzej (2003). "Optimization with stochastic dominance constraints". SIAM Journal on Optimization. 14: 548–566. doi:10.1137/S105262340242052.
• Ruszczyński, Andrzej; Shapiro, Alexander (2006). "Optimization of convex risk functions". Mathematics of Operations Research. 31 (3): 433–452. doi:10.1287/moor.1050.0186.
• Ruszczyński, Andrzej (2010). "Risk-averse dynamic programming for Markov decision processes". Mathematical Programming. Series B. 125: 235–261. doi:10.1007/s10107-010-0393-3.

Chess composition

Piotr Ruszczyński
1st Prize, Szachy, 1972

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

Mate in two moves

Piotr Ruszczyński
1st Prize, M. Vukcevich Mem. Ty., 2004

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

Mate in three moves

Under the name Piotr, Ruszczyński is known as an author of chess problems holding the title of International Master of Chess Composition of FIDE[16] (since 1988). 30 his problems of all genres were selected to FIDE Albums by the Permanent Commission of the FIDE for Chess Compositions.

To the left is one of early Ruszczyński's problems.[17] The key 1. Qa6! gives the black king three flight squares and threatens 2. Qxb5#. Black's defenses are followed by seven different battery mates: 1 ... Kb4 2. Sc6#, 1 ... Kc5 2. Sxb5#, 1 ... Kd3 2. Sc2#, 1 ... Qe8 2. Se6#, 1 ... Qxf5 2. Sxf5#, 1 ... Qxe2 2. Sxe2#, 1 ... Qf3+ 2. Sxf3#.

To the right is one of Ruszczyński's best-known threemovers.[18] The key is 1.Qf6! with the threat 2. fxg3+ Kxe1 3. Bd2#. In the two main variations, black Grimshaw interference on the square c3 is exploited with anticipatory shut-offs from a white half battery. After 1. ... Bc3 white plays 2. Nc2! (threatening 3. Bd2#), and then 2. ... Bxf6 3. Be3# (using the anticipatory shutoff on c2), 2. ... Bxb2 3. Bxb2#, and 2. ... Be1 3. Ne3#. After 1. ... Rc3 white plays 2. Bd2! (threatening 3. Nc2#), and then 2. ... Rf3 3. Nd3# (using the anticipatory shutoff on d2), 2. ... Re3 3. fxe3#, and 2. ... Rc1 3. fxg3#.

With Jan Rusinek, Ruszczyński co-authored the book: 64 Polish Chess Compositions. Warszawa: Polski Związek Szachowy. 1989.

References

1. XX Olimpiada Matematyczna (rok szk. 1968/69), http://om.edu.pl/stara_wersja/20.html Archived 2016-03-04 at the Wayback Machine
2. "Niektóre własności i metody rozwiązywania nieliniowych zadań programowania stochastycznego," Prace Naukowe - Politechnika Warszawska: Elektronika, Wydawnictwa Politechniki Warszawskiej, 1982.
3. History / About us / Faculty / FEIT - The Faculty of Electronics and Information Technology home page
4. "Professor's Risk Model Helps Guide Decision Making in Uncertain Times — Rutgers FOCUS". Archived from the original on 2013-05-07. Retrieved 2012-12-29.
5. "Andrzej Ruszczyński named Board of Governors Professor".
6. Birge, John; Louveaux, Francois (2011). Introduction to stochastic programming. New York, NJ: Springer. pp. xxvi+485. ISBN 978-1461402367. MR 2807730.
7. Kall, Peter; Mayer, János (2011). Stochastic Linear Programming: Models, Theory, and Computation. New York, NJ: Springer. pp. xx+426. ISBN 978-1441977281. MR 2744572.
8. Higle, J. L., Stochastic programming: Optimization when uncertainty matters, Tutorials in Operations Research, INFORMS 2005, ISBN 1-877640-21-2.
9. Rockafellar, R. T., Coherent approaches to risk in optimization under uncertainty, Tutorials in Operations Research, INFORMS 2007, ISBN 978-1-877640-22-3.
10. Sagastizabal, C., Divide to conquer: decomposition methods for energy optimization. Mathematical Programming, Ser. B, 134, 2012, 187-–222.
11. Andrzej Ruszczyński - Google Scholar Citations
12. Fellows: Alphabetical List, Institute for Operations Research and the Management Sciences, retrieved 2019-10-09
13. SIAM
14. MOS
15. Dantzig Prize Ceremony, Bordeaux 2018
16. International masters
17. Problem 101, FIDE Album 1971-1973, Sahovska Naklada, Zagreb, 1978
18. Odette Vollenweider, "Gleiche Inhalte in Zwei- und Dreizügern", Die Schwalbe, Deutsche Vereinigung für Problemschach, Heft 223, Februar 2007 (http://www.dieschwalbe.de/schwalbe223.htm).

External links

• Homepage of Andrzej Ruszczyński at Rutgers University. Contains biography, research overviews, lectures and presentations.
• [1] Rutgers Business School article on Ruszczyński.
• Andrzej Piotr Ruszczyński's results at International Mathematical Olympiad
• [2] Collection of chess compositions by Ruszczyński.