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Approximating fixed point of({\lambda},{\rho})-firmly nonexpansive mappings in modular function spaces
In this paper, we first introduce an iterative process in modular function
spaces and then extend the idea of a {\lambda}-firmly nonexpansive mapping from
Banach spaces to modular function spaces. We call such mappings as
({\lambda},{\rho})-firmly nonexpansive mappings. We incorporate the two ideas
to approximate fixed points of ({\lambda},{\rho})-firmly nonexpansive mappings
using the above mentioned iterative process in modular function spaces. We give
an example to validate our results
Exit spaces for Cox processes and the P\'olya sum process
For Cox processes we construct a Markov process with increasing paths to
couple the condensations of the Cox process in a monotone way. A similar
procedure procedure yields an analogue Markov process for the P\'olya sum
process. Moreover, we identify the exit spaces of these Markov processes and
identify them firstly as mixtures of certain extremal processes, i.e. as a
process in a random environment, and secondly as Gibbs processes
Average optimality for continuous-time Markov decision processes under weak continuity conditions
This article considers the average optimality for a continuous-time Markov
decision process with Borel state and action spaces and an arbitrarily
unbounded nonnegative cost rate. The existence of a deterministic stationary
optimal policy is proved under a different and general set of conditions as
compared to the previous literature; the controlled process can be explosive,
the transition rates can be arbitrarily unbounded and are weakly continuous,
the multifunction defining the admissible action spaces can be neither
compact-valued nor upper semi-continuous, and the cost rate is not necessarily
inf-compact
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