Characteristic has several meanings:

• in mathematics
  • characteristic function
  • Euler characteristic
  • characteristic (algebra)
  • characteristic subgroup
  • method of characteristics (partial differential equations)
• in physics and engineering
  • any characteristic curve that shows the relationship between certain input- and output parameters, e.g.
  • An I-V or current-voltage characteristic is the current in a circuit as a function of the applied voltage
  • Receiver-Operator Characteristic
• Characteristic is the Greek word "??????????????" for a property|attribute (= trait) of an entity.

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