By David M. Bressoud
This vigorous creation to degree concept and Lebesgue integration is encouraged via the old questions that ended in its improvement. the writer stresses the unique objective of the definitions and theorems, highlighting the problems mathematicians encountered as those rules have been sophisticated. the tale starts off with Riemann's definition of the vital, after which follows the efforts of these who wrestled with the problems inherent in it, until eventually Lebesgue eventually broke with Riemann's definition. together with his new method of figuring out integration, Lebesgue opened the door to clean and effective ways to the formerly intractable difficulties of research.
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