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Chapter FUNDAMENTAL CONCEPTS
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absolutely continuous Baire class belong bounded and measurable bounded variation called Cantor set cardinal number Cauchy sequence closed set continuous function converges to S(x corresponding to f(x countable union defined definition denoted elements everywhere f f(x f f(x)dx f(xk Fatou's theorem fi(x finite number fn(x fn(x)dx Fourier series Fourier series corresponding function f(x G L2 given infinite irrational numbers least upper bound Lebesgue integrable Let f(x lim f lim f(x limit point me(E me(T me(TnE mean to f(x measurable functions measurable sets measure zero monotonic increasing mutually disjoint natural numbers non-negative numbers in 0,1 nx dx open intervals open set orthonormal Parseval's identity partial sums partition points of subdivision Prove that f(x Prove Theorem rational numbers real numbers required result follows result of Problem Riemann integrable RIESZ-FISCHER THEOREM sequence of functions sin2 sn(x subdivision points subset Suppose unbounded uniformly convergent upper and lower upper sum