title: Jacobi's theorem
text: # Jacobi's theorem
  
  Jacobi's theorem can refer to:
  
  * Maximum power theorem, in electrical engineering
  * The result that the determinant of skew-symmetric matrices with odd size vanishes, see skew-symmetric matrix
  * Jacobi's four-square theorem, in number theory
  * Jacobi's theorem (geometry), on concurrent lines associated with any triangle
  * Jacobi's theorem on the normal indicatrix, in differential geometry
  * Jacobi's theorem on conjugate points, in differential geometry
  