Functions of real variables Real Functions 67 Mathematical analysis 40 Analysis 21 Analysis (Mathematics) 21 Functional analysis 15 Measure theory 15 more ... Functional Analysis 14 Functions of complex variables 13 Measure and Integration 13 Functions of a Complex Variable 11 Applied mathematics 9 Engineering mathematics 9 Sequences (Mathematics) 9 Sequences, Series, Summability 9 Fourier Analysis 7 Fourier analysis 7 Partial Differential Equations 7 Partial differential equations 7 Differential equations 6 Operator Theory 6 Operator theory 6 Ordinary Differential Equations 6 Applications of Mathematics 5 Algebra 4 Approximation theory 4 Approximations and Expansions 4 History 4 History of Mathematical Sciences 4 Mathematical and Computational Engineering 4 less ...