- infinitesimal prolongation theorem
- infinitesimal stability of differentiable mappings
- infinitesimal stablity of differentiable mapping germs
- infinitesimal symmetry
- infinitesimal transformation
- infinitesimal vectors
- infinite stability
- infinite sum in Boolean algebras
- infinite sum theorem
- infinite telescopes
- infinite-valued logical paradox
- infinite vectors
- infinite limit
- infinity
- inflationary cosmological model
- inflection point
- inflection point, flex
- inflection point of inverse trigonometric function
- influence case
- influence function
- information
- information classification method
- information criteria
- information dimension
- information dynamic game