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

This disambiguation page lists articles associated with the title Jacobi's theorem.
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