(law) In copyright law, a work that is a variation of an original work sufficiently similar to contain protected elements of the original work, but sufficiently different to qualify for copyright protection independent of the original work.

plural of Schwarzian derivative

(singular only) A particular operator that, when applied to a function f yields a function x↦(f(x))/(f'(x))-3/2((f(x))/(f'(x)))² / (countable) Any image of that operator.

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(mathematics) A particular generalization of the derivative of a function between two Banach spaces.

plural of quasi-derivative

plural of derivative instrument

plural of event derivative

(algebra) With respect to a Boolean variable x_i: The XOR-sum of the positive and negative Shannon cofactors of the given derived function with respect to x_i. In symbols: ∂f/∂x_i(⃑x)=f_x_i(⃑x)⊕f_̄x_i(⃑x).

plural of logarithmic derivative