*e*Euler number (and sequences) - see Sequences - Theory - Applications - Pi and Euler number*e*to logarithm trick - see Functions - Methods Survey - Limits - Indeterminate power and Functions - Theory - Elementary functions - General powers- element of a set - see Extra - Sets and mappings - Basic set theory
- elementary functions
- elementary derivatives - see Derivatives - Theory - Introduction - Elementary derivatives
- elementary integrals - see Integrals - Theory - Methods of integration - Elementary integrals and Integrals - Methods Survey - Methods of integration - Elementary integrals
- elementary limits - see here
- ellipse
- epsilon-delta game - see Functions - Theory - Real functions - Continuity and Functions - Theory - Limit - Definition
- equality of functions - see Functions - Theory - Real functions - Introduction
- equality of sets - see Extra - Sets and mappings - Basic set theory
- equations - see Extra - Solving Equations and inequalities
- equivalent infinitesimals - see the box in Functions - Methods Survey - Limits
- Ermakoff's test - see Series - Theory - Testing convergence - More tests
- even function - see Functions - Theory - Real functions - Basic properties and Functions - Methods Survey - Basic properties - Symmetry
- even functions and Fourier series - see Series - Theory - Series of functions - Fourier series
- even functions and Taylor series - see Series - Theory - Series of functions - Taylor series
- expanding functions - see Series - Methods Survey - Series of functions - Expanding in power series and Series - Methods Survey - Series of functions - Expanding in Fourier series and Taylor polynomial and series and Fourier series
- exponential
- extended real line - see Functions - Theory - Real numbers - Intervals and neighborhoods
- extrema of functions
- Extreme value theorem (EVT) - see Functions - Theory - Real functions - Continuity