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Search options questions only not deleted user 6129

Questions that are about research in mathematics, or about the job of a research mathematician, without being mathematical problems or statements in the strictest sense. Do not use this tag for easy or supposedly easy mathematical questions.

7 votes
0 answers
311 views

A citation from Dieudonné about existence, classification and construction

I am looking for an exact quote from Jean Dieudonné saying more or less that there are three kinds of important problems in mathematics: problems of existence, classification and construction. The q …
110 votes
10 answers
30k views

What is the oldest open problem in mathematics?

What is the oldest open problem in mathematics? By old, I am referring to the date the problem was stated. Browsing Wikipedia list of open problems, it seems that the Goldbach conjecture (1742, every …