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Multicriteria Reinforcement Learning
, 1998
"... We consider multicriteria sequential decision making problems where the vectorvalued evaluations are compared by a given, fixed total ordering. Conditions for the optimality of stationary policies and the Bellman optimality equation are given. The analysis requires special care as the topology int ..."
Abstract

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We consider multicriteria sequential decision making problems where the vectorvalued evaluations are compared by a given, fixed total ordering. Conditions for the optimality of stationary policies and the Bellman optimality equation are given. The analysis requires special care as the topology introduced by pointwise convergence and the ordertopology introduced by the preference order are in general incompatible. Reinforcement learning algorithms are proposed and analyzed. Preliminary computer experiments confirm the validity of the derived algorithms. It is observed that in the mediumterm multicriteria RL often converges to better solutions (measured by the first criterion) than their singlecriterion counterparts. These type of multicriteria problems are most useful when there are several optimal solutions to a problem and one wants to choose the one among these which is optimal according to another fixed criterion. Example applications include alternating games, when in addition...