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	STUDIA MATHEMATICA - Issue no. 1 / 2006

	Article:	OPTIMAL QUADRATURE FORMULAS BASED ON THE ϕ-FUNCTION METHOD. Authors: TEODORA CĂTINAŞ, GHEORGHE COMAN.


	Abstract: . In this survey paper it is studied the optimality in sense of Nikolski for some classes of quadrature formulas, using the method of ϕ-- function. It is presented the one-to-one correspondence between ϕ--func- tions and the quadrature formulas. Also, there are given some examples of quadrature formulas which are optimal in sense of Nikolski with regard to the error.




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