title: Separatrix
text: # Separatrix
  
  Separatrix (from Latin, the feminine form of "separator") may refer to:
  
  * Separatrix (decimal mark), an ⟨L⟩ mark or vertical bar ⟨|⟩ formerly used as a decimal point
  * Separatrix, a proofreader's mark resembling the slash ⟨/⟩
  * Separatrix in math, the boundary separating two modes of behaviour in a differential equation
  * A mechanism for magnetically limiting a plasma, and hence for controlling the nuclear fusion in a tokamak; see divertor
  