List of things named after Jacques Hadamard

These are things named after Jacques Hadamard (1865–1963), a French mathematician. (For references, see the respective articles.)

• Cartan–Hadamard theorem
• Cauchy–Hadamard theorem
• Hadamard product:
  • entry-wise matrix multiplication
  • an infinite product expansion for the Riemann zeta function
• Hadamard code
• Hadamard's dynamical system
• Hadamard's inequality
• Hadamard's method of descent
• Hadamard finite part integral
• Hadamard's lemma
• Hadamard manifold
• Hadamard matrix
• Hadamard's maximal determinant problem
• Hadamard space
• Hadamard three-circle theorem
• Hadamard Transform and Hadamard gate
• Hadamard–Rybczynski equation
• Ostrowski–Hadamard gap theorem