Mathematical Sciences Classification System
47Nxx - Miscellaneous applications of operator theory 
[See also  46Nxx]
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                            47N10Applications in optimization, convex analysis, mathematical programming, economics
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                            47N20Applications to differential and integral equations
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                            47N30Applications in probability theory and statistics
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                            47N40Applications in numerical analysis [See also 65Jxx]
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                            47N50Applications in the physical sciences
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                            47N55Applications in statistical physics
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                            47N60Applications in chemistry and life sciences
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                            47N70Applications in systems theory, circuits, and control theory
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                            47N99None of the above, but in this section