> 46-XX Functional analysis > 46NXX Miscellaneous applications of functional analysis

46N10 Applications in optimization, convex analysis, mathematical programming, economics	46N20 Applications to differential and integral equations	46N30 Applications in probability theory and statistics
46N40 Applications in numerical analysis	46N50 Applications in quantum physics	46N55 Applications in statistical physics
46N60 Applications in biology and other sciences	46N99 None of the above, but in this section

46NXX Miscellaneous applications of functional analysis