Balanced Incomplete Block Design

• Icosahedron Stellations
• Icosian Game
• Icosidodecadodecahedron
• Icosidodecahedron
• Icosidodecahedron Stellation
• Icosidodecatruncated Icosidodecahedron
• Icositruncated Dodecadodecahedron
• Ida Surface
• Ideal
• Ideal Number
• Ideal (Partial Order)
• Ideal Point
• Idele
• Idemfactor
• Idempotent
• Identity
• Identity Element
• Identity Function
• Identity Map
• Identity Matrix
• Identity Operator
• Idoneal Number
• Iff
• Ill-Conditioned
• Illumination Problem