- elementary matrix
- elementary nonstandard model of analysis
- elementary number theory
- elementary operation of linear operators
- elementary operator
- elementary part of*-map
- elementary part of super-structure
- elementary predicate
- elementary product
- elementary recursive set
- elementary renewal theorem
- elementary spherical triangle
- elementary subgroup
- elementary sum
- elementary surveying
- elementary symmetric function of variable pairs
- elementary symmetric polynomial
- elementary symmetric polynomial of variable pairs
- elementary transcendental function
- elementary transformations of a system of linear equations
- elementary transformations of matrices
- elementary transformations of λ-matrices
- elementary wave
- elementary λ-matrices
- element at infinity