input: Andrzej_Piotr_Ruszczyński | professionalField | Mathematical_optimization
target: Mathematical optimization is the professional field of Andrzej Piotr Ruszczynski.
references: Mathematical optimization is the professional field of Andrzej Piotr Ruszczynski. Andrzej Piotr Ruszczyński is a professional in the field of mathematical optimization. Andrzej Piotr Ruszczyński works in the field of mathematical optimization.