title: Euler operator
text: # Euler operator
  
  In mathematics Euler operators may refer to:
  
  * Euler–Lagrange differential operators d/dx: see Lagrangian system
  * Cauchy–Euler operators e.g. x·d/dx
  * quantum white noise conservation or QWN-Euler operator
  * Euler operator (digital geometry), a local operation on a mesh which preserves topology
  