- inclination lemma
- inclined angle of a trihedral angle
- included angle between two vectors
- including-excluding principle
- inclusion
- inclusion between two spheres
- inclusion division
- inclusion functor
- inclusion interval length of T(f,ε)
- inclusion mapping
- inclusion of fuzzy sets
- inclusion of relation
- inclusion of two circles
- inclusion relation of sets
- incoherent scattering
- incommensurable line segments
- incomparable Boolean elements
- incomparable topologies
- incomparable valuation rings
- incomparable valuations
- incompatible concepts
- incompatible disjunctive inference
- incompatible relation
- incompatible relations
- incomplete beta function