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