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mathcounterexamples.net
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I'm living in Paris, France and doing Math as a hobby, with special interest in Mathematical logic and Analysis.

I opened in July 2014 a website dedicated to Math Counterexamples. I welcome any suggestion for additional counterexamples... at least at a level that I can understand!

My LinkedIn page. A long time ago I programmed some modules of CATIA a famous computed aided design solution.

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4
Reputation not moving up while having 27 upvotes
Sep 21 '14
4
Latex software used by MO
Dec 26 '13
2
MathJax configuration in MO ==> not displaying bottom left messages [closed]
Sep 22 '14
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66
Results true in a dimension and false for higher dimensions
36
Why does this sequence converges to $\pi$?
30
Group $G$ whose center $Z(G)$ is cyclic and with $G/Z(G)$ commutative
23
Proof: Is there a line in the xy plane that goes through only rational coordinates?
20
Proof that the number of proofs is countably infinite

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