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Positive solutions of operator equations

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The article was published on 1964-01-01 and is currently open access. It has received 2084 citations till now. The article focuses on the topics: Semi-elliptic operator & C0-semigroup.

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Controlled Markov processes and viscosity solutions

TL;DR: In this paper, an introduction to optimal stochastic control for continuous time Markov processes and to the theory of viscosity solutions is given, as well as a concise introduction to two-controller, zero-sum differential games.
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Bifurcation from simple eigenvalues

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Positive solutions for boundary value problem of nonlinear fractional differential equation

TL;DR: In this paper, the positive solution of nonlinear fractional difier- ential equation with semi-positive nonlinearity was investigated and the existence results of positive solution were obtained by using Krasnosel'skii flxed point theorem.
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Traveling wave solutions of parabolic systems

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