Mathematical Sciences Classification System
47Dxx - Groups and semigroups of linear operators, their generalizations and applications
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                            47D03
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                            47D06
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                            47D07Markov semigroups and applications to diffusion processes {For Markov processes, see 60Jxx}
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                            47D08Schrödinger and Feynman-Kac semigroups
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                            47D09Operator sine and cosine functions and higher-order Cauchy problems [See also 34G10]
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                            47D60$C$-semigroups, regularized semigroups
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                            47D62Integrated semigroups
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                            47D99None of the above, but in this section