Sum rule may refer to:
- Sum rule in differentiation
- Sum rule in integration
- Rule of sum, a counting principle in combinatorics
- The sum rule in probability theory follows directly from the probability axioms
- Sum rule in quantum mechanics
Famous quotes containing the words sum and/or rule:
“I was brought up to believe that the only thing worth doing was to add to the sum of accurate information in the world.”
—Margaret Mead (1901–1978)
“To rule is not so much a question of the heavy hand as the firm seat.”
—José Ortega Y Gasset (1883–1955)