- harmonic map
- harmonic mean
- harmonic measure
- harmonic measure
- harmonic measure at the ideal boundary
- harmonic minorant
- harmonic minorant
- harmonic new better than used in expectation
- harmonic new worse than used in expectation class
- harmonic operator
- harmonic pencil of lines
- harmonic pencil of planes
- harmonic p-forms
- harmonic polynomial
- harmonic polynomial
- harmonic progression
- harmonic property of a complete quadrangle
- harmonic property of a complete quadrilateral
- harmonic quadrilateral
- harmonic range of points
- harmonic ratio
- harmonic series
- harmonic series
- harmonic sheaf
- harmonic sheaf associated with a hyperharmonic sheaf