Robert Israel's user avatar
Robert Israel's user avatar
Robert Israel's user avatar
Robert Israel
  • Member for 13 years
  • Last seen this week
62 votes

Series whose convergence is not known

54 votes

Nonequivalent definitions in Mathematics

44 votes
Accepted

Distinctness of products of Fibonacci numbers

40 votes

Intuition behind Harmonic Analysis in Analytic Number Theory

35 votes

Examples of theorems misapplied to non-mathematical contexts

34 votes

Counterexamples to differentiation under integral sign?

34 votes

Is this differential identity known?

31 votes

Billiard dynamics under gravity

30 votes

Simultaneous zero set of two equations in $\mathbb R^3$

29 votes

Examples of integer sequences coincidences

27 votes

Fermat's Last Theorem for integer matrices

27 votes
Accepted

Can integration spoil real-analyticity?

27 votes

Are there any "related rates" calculus problems that don't feel contrived?

27 votes

The reals as continuous image of the irrationals

25 votes

What kind of jobs are available for a quantum logician?

24 votes
Accepted

Hamming distance to primes

24 votes

Pathology in Complex Analysis

24 votes

Finitely generated matrix groups whose eigenvalues are all algebraic

24 votes

Nonstandard analysis in probability theory

24 votes

A question regarding a claim of V. I. Arnold

24 votes
Accepted

Proof that no differentiable space-filling curve exists

23 votes

Which polynomial's roots are its coefficients?

22 votes
Accepted

Numbers with known irrationality measures?

22 votes
Accepted

Fourier series of $e^{\cos x}$

21 votes
Accepted

Are "most" operators on an infinite-dimensional complex Banach space "diagonalizable"?

20 votes

Famous mathematicians with background in arts/humanities/law etc

20 votes

Behaviour at natural boundary

20 votes

Numerical coincidence? Why is $\sum(x^{k^2}) = \sum(x^{(k+1/2)^2})$ for $x = 0.8$?

19 votes
Accepted

roots of higher derivatives of exponential

19 votes

Infinite series with signed sums

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