Lucas' Married Couples Problem

• Chordal Theorem
• Chow Coordinates
• Chow Ring
• Chow Variety
• Christoffel-Darboux Formula
• Christoffel-Darboux Identity
• Christoffel Formula
• Christoffel Number
• Christoffel Symbol of the First Kind
• Christoffel Symbol of the Second Kind
• Chromatic Number
• Chromatic Polynomial
• Chu Identity
• Church's Theorem
• Church's Thesis
• Church-Turing Thesis
• Chu Space
• Chu-Vandermonde Identity
• Chvátal's Art Gallery Theorem
• Chvátal's Theorem
• ci
• Ci
• Cigarettes
• Cin
• Circle