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Number theory is useful, since one can graduate with it.

— Edmund Landau

Die Zahlentheorie ist nützlich, weil man mit ihr promovieren kann.

Original text (German)

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More quotes by Edmund Landau

Please forget everything that you have learned in school; for you haven't learned it.

Foundations of Analysis (1960)

I will ask of you only the ability to read English and to think logically—no high school mathematics, and certainly no higher mathematics.

Grundlagen der Analysis [Foundations of Analysis (1930)

Please don't read the preface for the teacher.

Grundlagen der Analysis [Foundations of Analysis (1930)

We mathematicians are all a little bit crazy.

The multiplication table will not occur in this book, not even the theorem,2 \cdot 2 = 4,but I would recommend, as an exercise, that you define2 = 1 + 1,
4 = (((1 + 1) + 1) + 1)and then prove the theorem.

Grundlagen der Analysis [Foundations of Analysis (1930)

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Quote text and notes from Wikiquote: Edmund Landau (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.