Inverse is the opposite of something. This word and its derivatives are used greatly in mathematics, as illustrated below.

• Inverse element of an element x in a binary operation with identity element e is x⁻¹ so that x * x⁻¹ = x⁻¹ * x = e
• Inversion in a point — a geometric transform
• Circle inversion — maps the outside of a circle to the inside and vice-versa
• Inverse function — a function that "reverses" the action of a given function
• Inverse limit — notion in abstract algebra.
• Inverse (logic) — ~p → ~q is the inverse of p → q
• Inverse matrix — inverse element with respect to matrix multiplication
• Inverse proportion, also inversely proportional — a relationship between two variables x and y characterized by the equation $y=k/x.$
• Inverse problem — the task of identifying model parameters from observed data; see for example inverse scattering, inverse kinematics, inverse dynamics
• Inverse perspective — the further the objects, the larger they are drawn
• Inverse-square law — the magnitude of a force is proportional to the inverse square of the distance
• Inverse transform sampling method — generate some random numbers according to a given probability distribution
• Inverse chain rule method — related to integration and differentiation

Mathematical disambiguation

Invers | Invers | inversie | Inverse | inwersja | Invers