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math.CO2005
Embeddability of Arrangements of Pseudocircles into the Sphere
Ronald Ortner
An arrangement of pseudocircles is a finite set of oriented closed Jordan curves each two of which cross each other in exactly two points. To describe the combinatorial structure o…
math.CO2005
Combinations and Mixtures of Optimal Policies in Unichain Markov Decision Processes are Optimal
Ronald Ortner
We show that combinations of optimal (stationary) policies in unichain Markov decision processes are optimal. That is, let M be a unichain Markov decision process with state space…