Donkey_2009

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34 Answers

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86	Why is every answer of $5^k - 2^k$ divisible by 3?
9	Finding the 2,147,483,647th prime number
6	Proof of $\gcd(a,b)=ax+by$
5	Examples of apparent patterns that eventually fail
5	Using induction to take $\epsilon \rightarrow 0$

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1,714 Reputation

+210	Why is every answer of $5^k - 2^k$ divisible by 3?
+10	No ideas to collapse $\boldsymbol{(\nabla\times B)\times C-(B\times\nabla)\times C}+\boldsymbol\nabla(\boldsymbol B\bullet\boldsymbol C)$
+20	How to solve equation such polynomial: $x^3-bx^2+c=0$ in real domain

8 Questions

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15	Continuity and the Axiom of Choice
11	Counterexamples to proofs of correct statements
5	Associativity: why does $((a \ast b) \ast c) = (a \ast (b \ast c))$ mean we can bracket longer expressions however we like? [duplicate]
5	Quickest way to understand Kruskal's Tree Theorem
3	What exactly is meant by 'Integrate the Equation of Motion'?

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50 Tags

94 elementary-number-theory × 3	7 induction × 2
11 proof-strategy × 3	6 proof-writing × 3
9 abstract-algebra × 5	6 arithmetic × 3
9 prime-numbers	6 algebra-precalculus × 2
9 computer-science	6 divisibility

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6 Accounts

$Mathematics Stack Exchange$	Mathematics	1,714 rep	314
$TeX - LaTeX Stack Exchange$	TeX - LaTeX	190 rep	4
	Musical Practice & Performance	138 rep	3
	Stack Overflow	110 rep	4
	English Language & Usage	101 rep	1

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Mortarboard	Nice Question × 2
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