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Photography
Hagen von Eitzen's user avatar
Hagen von Eitzen's user avatar
Hagen von Eitzen's user avatar
Hagen von Eitzen
  • Member for 10 years, 4 months
  • Last seen more than 4 years ago
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I did study math and had a knack for it, but I am sooo out of that business now ...

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Weekly Featured Image: Ongoing Contest
Aug 18, 2015
Top network posts
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359
How can a piece of A4 paper be folded in exactly three equal parts?
243
Why is empty set an open set?
175
Can you be 1/12th Cherokee?
134
Is tipping mandatory at Restaurants and Bars in Germany?
110
Connected metric spaces with disjoint open balls