source

where Q > 0 and er = (cosθ, sinθ) is the unit radial vector. Q is then the flux across any simple closed curve around the origin. The complex potential is

Note this is a multifunction (a consequence of the flow not being irrotational). When Q < 0, the above singularity is a sink. For diagrams of a source and sink, see singularity (fluid dynamics).

• characteristic vector
• character table
• chart
• chart
• Chebyshev, Pafnuty Lvovich
• Chebyshev polynomials
• Chebyshev's inequality
• Chebyshev's Theorem
• check digit
• Chen's theorem
• Chinese postman problem
• Chinese remainder theorem
• chirality
• chi-squared contingency table test
• chi-squared distribution
• chi-squared test
• Cholesky's decomposition
• chord
• Christoffel symbol
• chromatic number
• Church, Alonzo
• Church's thesis
• Chu Shih-chieh
• cipher
• cipher