Top network posts

• 9 Is there $n \geq 2$ such that $1^1 + 2^2 + \dots + n^n$ is a perfect square?
• 9 What does it mean for $G\times H$ to be abelian?
• 8 Determining the point from which the most area in a polygon is visible
• 6 When we speak of a group, must we explicitly specify a certain binary operation?
• 6 When does the recurrence $a_k = 3a_{k - 1} + 1$ reach a power of 2?
• 5 Computing canonical polyhedra without numerical methods
• 5 Find the largest of the three prime divisors of the number $13^4 + 16^5 - 172^2$
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