Dave L. Renfro
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 128 How discontinuous can a derivative be? 40 How to show this formula to get a square root of a number in “just few seconds” is true? 34 Visualizing the factorial 28 “Area” of the topologist's sine curve 23 What is the smallest constant that has explicitly appeared in a published paper?

### Reputation (17,081)

 +30 On notation: is it better to say $A^B = \{f| f:B \to A\}$ or $A^B = \{f :B \to A| f \text{ is a function}\}$ +30 Which quantity is greater? +5 Integers $n$ such that $i(i+1)(i+2) \cdots (i+n)$ is real or pure imaginary +10 How discontinuous can a derivative be?

### Questions (2)

 52 Integers $n$ such that $i(i+1)(i+2) \cdots (i+n)$ is real or pure imaginary 11 Bibliography for Singular Functions [closed]

### Tags (157)

 441 real-analysis × 81 164 derivatives × 14 266 reference-request × 89 150 measure-theory × 31 206 calculus × 66 101 general-topology × 24 193 soft-question × 44 61 radicals × 7 190 examples-counterexamples × 9 60 logic × 9

### Accounts (5)

 Mathematics 17,081 rep 22253 Mathematics Educators 2,012 rep 39 History of Science and Mathematics 746 rep 19 MathOverflow 690 rep 76 Academia 448 rep 8