# Sum Rule

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

### Other articles related to "sum rule, sum, rule":

Sum Rule In Differentiation
... In calculus, the sum rule in differentiation is a method of finding the derivative of a function that is the sum of two other functions for which derivatives exist ... The sum rule in integration follows from it ... The rule itself is a direct consequence of differentiation from first principles ...
Sum Rule In Differentiation - Proof
... Let y be a function given by the sum of two functions u and v, such that Now let y, u and v be increased by small increases Δy, Δu and Δv respectively ... throughout by Δx Let Δx tend to 0 Now recall that y = u + v, giving the sum rule in differentiation The rule can be extended to subtraction, as follows Now use the special case of the constant ...
Reinhard Oehme - Work - Dispersion Relations, GMO Sum Rule, and Edge of The Wedge Theorem
... scattering, which also contains the Goldberger-Miyazawa-Oehme Sum Rule ... The GMO Sum Rule is often used in the analysis of the pion-nucleon system ...

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