chandok

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seen Jul 15 '11 at 21:58
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67 Answers

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18
A nontrivial everywhere continuous function with uncountably many roots?
11
Is this space contractible?
9
$(7a+1)x^3+(7b+2)y^3+(7c+4)z^3+(7d+1)xyz=0$ does not have integer solutions
8
How do you show this property of a differentiable function given information about the derivative?
8
The set of rational numbers of the form p/p', where p and p' are prime, is dense in $[0, \infty)$
7
What's wrong with this inference in natural deduction?
7
Deformation retract on path-connected space
7
Show that $3^{4n+2} + 1$ is divisible by $10$
6
L* regular -> L regular?
5
How to find the sum of the following series
5
$\tan(\frac{\pi}{2}) = \infty~$?
5
Is there a simple proof for ${\small 2}\frac{n}{3}$ is not an integer when $\frac{n}{3}$ is not an integer?
5
Is any transposition a product of simple transpositions?
5
Conjoining elements to fields which are the roots of irreducible polynomials
4
Number of possible sets for given N
4
Prime Appearances in Fibonacci Number Factorizations
4
Congruence modulo prime power
4
Count the number of positive solutions for a linear diophantine equation
4
How to solve 700 = 7x + 6y for a range of values?
4
Dynamic programming - A type of balanced 0-1 matrix
3
Tribonacci sequence modulo X
3
How often does the Jacobi symbol incorrectly identify quadratic residues?
3
Is this function a primitive recursive function?
3
Is there an intuitionistic proof of $\lnot p(a) \rightarrow p(b) \vdash \exists x p(x)$, what would Herbrand's Theorem say?
3
If $a\mathbf{x}+b\mathbf{y}$ is an element of the non-empty subset $W$, then $W$ is a subspace of $V$
3
Roots of a polynomial with irrational coefficients
3
Building a Bernoulli sequence where finite patterns repeat infinitely often
3
Exact powers of an integer matrix
3
Estimating a sum containing a uniformly distributed but deterministic term
3
Equation on permutations
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