increment (laplacian operator)

Περιγραφή

This symbol can be used as an operator to either indicate the discriminant, the laplacian operator or the increment (change in a quantity).

• In the Marburg, UEB and Woluwe codes it indicates the increment.
• In the Spanish, Antoine Swedish and Chinese codes it indicates the laplacian operator.
  
• In the Italian code, the first symbol indicates the laplacian operator, while the second symbol indicates the discriminant