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Change of variables is an operation that is related to substitution. However these are different operations, as can be seen when considering differentiation or integration (integration by substitution). A very simple example of a useful variable change can be seen in the problem of finding the roots of the sixth-degree polynomial:
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The formula for change (or "the change formula") provides a model to assess the relative strengths affecting the likely success of organisational change programs. The formula was created by David Gleicher while he was working at management consultants Arthur D. Little in the early 1960s, [1] refined by Kathie Dannemiller in the 1980s, [2] and further developed by Steve Cady.
Cavalieri's quadrature formula; Fundamental theorem of calculus; Integration by parts; Inverse chain rule method; Integration by substitution. Tangent half-angle substitution; Differentiation under the integral sign; Trigonometric substitution; Partial fractions in integration. Quadratic integral; Proof that 22/7 exceeds π; Trapezium rule ...
Repeated measures design is a research design that involves multiple measures of the same variable taken on the same or matched subjects either under different conditions or over two or more time periods. [1]
The predicate calculus goes a step further than the propositional calculus to an "analysis of the inner structure of propositions" [4] It breaks a simple sentence down into two parts (i) its subject (the object (singular or plural) of discourse) and (ii) a predicate (a verb or possibly verb-clause that asserts a quality or attribute of the object(s)).
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Leonard–Merritt formula: Astrophysics: Peter Leonard and David Merritt: Levy–Mises equations: Solid mechanics: Paul Lévy and Richard von Mises: Liénard equation: Dynamical systems: Alfred-Marie Liénard: Lighthill equation: Aeroacoustics: James Lighthill: Lindblad equation: Quantum mechanics: G. Lindblad: Lin–Tsien equation: PDE: Lin ...