Hadamard (disambiguation)
From Wikipedia, the free encyclopedia
Hadamard may refer to:
- Zélie Hadamard (1849–1901), French actress
- Jacques Hadamard (1865–1963), a French mathematician, whose name is associated with the following topics in mathematics:
- Hadamard space, a geodesically complete metric space of non-positive curvature
- Cartan–Hadamard theorem, a result on the topology of non-positively curved manifolds
Differential equations and dynamical systems
- Hadamard's method of descent, a method of solving partial differential equations by reducing dimensions
- Hadamard parametrix construction, a method of solving second order partial differential equations
- Hadamard's dynamical system, a type of chaotic dynamical system
Complex analysis and convexity
- Hadamard three-lines theorem: a bound on the maximum modulus complex analytic functions defined on a strip in the complex plane;
- Hadamard three-circle theorem, a bound on the maximum modulus of complex analytic functions defined on an annulus in the complex plane; closely related to the three-lines theorem;
- Hadamard factorization theorem, a specific factorization of an entire function of finite order, involving its zeros and the exponential of a polynomial
- Ostrowski–Hadamard gap theorem, a result on the analytic continuation of lacunary power series
- Hermite–Hadamard inequality, bounding the integral of convex functions.
