Top network posts

• 177 Did Euler make the elementary mistake √-2 √-3 = √6?
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• 95 What allows us to use imaginary numbers?
• 70 Under copyleft, why distinguish between "free as in free speech" and "free as in free beer"?
• 61 Parachute equivalent when there is no ground
• 59 What does the word "just" mean in this context?
• 58 What is a topological space good for?
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