# MATH HISTOTY: A very difficult question aboutthe history of mathematics **URL:** \ **Category:** Factual Questions\ **Created:** [August 18, 2018, 6:31pm UTC](https://boards.straightdope.com/t/math-histoty-a-very-difficult-question-aboutthe-history-of-mathematics/819842 "2018-08-18T18:31:24Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![Lance\_Turbo](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/lance_turbo/32/6156_2.png) [@Lance\_Turbo](https://boards.straightdope.com/u/Lance_Turbo)\ **Post date:** [August 18, 2018, 7:51pm UTC](https://boards.straightdope.com/t/math-histoty-a-very-difficult-question-aboutthe-history-of-mathematics/819842/4 "2018-08-18T19:51:09Z")
This post from your previous thread on this exact topic contains links to multiple examples of what you’re looking for. > [@History of mathematics Question](https://boards.straightdope.com/t/history-of-mathematics-question/809068/9): > > Here’s a couple of webpages with examples of what you’re looking for: > > [ho.history overview - Widely accepted mathematical results that were later shown to be wrong? - MathOverflow](https://mathoverflow.net/questions/35468/widely-accepted-mathematical-results-that-were-later-shown-to-be-wrong) > > [fake proofs - In the history of mathematics, has there ever been a mistake? - Mathematics Stack Exchange](https://math.stackexchange.com/questions/139503/in-the-history-of-mathematics-has-there-ever-been-a-mistake) Here is one of several… > [@](#): > > A convergent infinite series of continuous functions is continuous. Cauchy gave a proof of this (1821). See Theorem 1 in Cours D’Analyse Chap. VI Section 1. Five years later Abel pointed out that certain Fourier series are counterexamples. --- _[View the full topic](https://boards.straightdope.com/t/math-histoty-a-very-difficult-question-aboutthe-history-of-mathematics/819842)._