Jacobian conjecture
CONJECTURE ASSERTING THAT, OVER A CHARACTERISTIC-ZERO FIELD K, GIVEN A POLYNOMIAL MAP F: Kⁿ → Kⁿ, IF ITS JACOBIAN DETERMINANT J: Kⁿ → K IS A NONZERO CONSTANT MAP, THEN F ADMITS A POLYNOMIAL INVERSE G: Kⁿ → Kⁿ
Keller's problem; Smale's sixteenth problem; Jacobian problem
In mathematics, the Jacobian conjecture is a famous unsolved problem concerning polynomials in several variables. It states that if a polynomial function from an n-dimensional space to itself has Jacobian determinant which is a non-zero constant, then the function has a polynomial inverse.