• Two-sided Laplace transform, integral transform closely related to the Fourier transform, Mellin transform, and ordinary Laplace transform
• Two-sided ideal, a type of ideal in ring theory
• Two-sided markets, economic networks having two distinct user groups that provide each other with network benefits
• Two-sided prime, a type of prime that is both left-truncatable and right-truncatable
• Two-sided test, statistical test used in inference

See also

• 2-sided