Wallis Sieve
A compact set 
with Area
created by punching a square hole of length
in the center of a square. In each of the eight squares remaining,punch out another hole of length 
, and so on.- Impulse Pair
- Impulse Symbol
- Inaccessible Cardinal
- Inaccessible Cardinals Axiom
- Inadmissible
- In-and-Out Curve
- Incenter
- Incenter-Excenter Circle
- Incidence Axioms
- Incidence Matrix
- Incident
- Incircle
- Inclusion-Exclusion Principle
- Inclusion Map
- Incommensurate
- Incomplete Gamma Function
- Incompleteness
- Increasing Function
- Increasing Sequence
- Indefinite Integral
- Indefinite Quadratic Form
- Indegree
- Independence Axiom
- Independence Complement Theorem
- Independence Number