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Jakub Konieczny

Oxford, United Kingdom

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63
Is there any good reason to write “it is easy to see”?
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27
Why is Sauron always portrayed as being stronger than Gandalf?
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24
Is there a property that is not preserved by isomorphism?
math.stackexchange.com

18
If $f(x)f(y)=f(\sqrt{x^2+y^2})$ how to find $f(x)$
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16
Which is larger? $20!$ or $2^{40}$?
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16
Can a ring without a unit element have a subring with a unit element?
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12
Is it a new type of induction? (Infinitesimal induction) Is this even true?
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11
If $p$ and $p^2+8$ are both prime numbers, then $p^3+4$ is prime.
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11
Find number of positive integral solutions of
math.stackexchange.com

11
Can every set be a group?
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10
Remainder when $20^{15} + 16^{18}$ is divided by 17
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10
Proving that the coefficients of the characteristic polynomial are the traces of the exterior powers
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10
Symbol for “probably equal to” (barring pathology)?
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10
Are there arbitrarily large gaps between consecutive primes?
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10
What happens if someone publishes a paper on your current PhD thesis topic
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9
Is it bad form to use the word exciting in a paper, when discussing other people's results?
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9
Related to greatest prime number that divides $n.$
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9
In the history of mathematics, has there ever been a mistake?
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9
Prove by induction that for all $n \geq 3$: $n^{n+1} > (n+1)^n$
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8
Among all shapes with the same area, a circle has the shortest perimeter
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8
What is the sense of the equality sign =?
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8
Why is 1 raised to infinity Not defined and not “1”
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8
Is there a minimal diverging series?
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7
Strange behavior of $\lim_{x\to0}\frac{\sin\left(x\sin\left(\frac1x\right)\right)}{x\sin\left(\frac1x\right)}$
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7
How does aptitude at solving Olympiad problems relate to success at further mathematical studies?
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7
Does there exist an $a_0$ such that the sequence $a_{n+1} = 2a_n + 1$ is prime for all $n \ge 0$?
math.stackexchange.com

7
Proof: $a^2 - b^2 = (a-b)(a+b)$ holds $\forall a,b \in R$ iff R is commutative
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7
Is it plagiarism (or bad practice) to cite reviews instead of source material directly?
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6
Assigning students to write solution sets
matheducators.stackexchange.com

6
We can write a positive rational number $q$ in form : $ q=\dfrac{a^3+b^3}{m^2+n^2}$.
math.stackexchange.com

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