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S Nov 9, 2015 at 9:49 history suggested Andrea CC BY-SA 3.0
Minor typos
Nov 9, 2015 at 9:17 comment added Andrea Very clear, thanks a lot. Interesting that $(6)\Rightarrow (3)$ does not work for general $M$, also considered what it means geometrically. It would be nice to understand whether there are counterexamples.
Nov 9, 2015 at 9:15 review Suggested edits
S Nov 9, 2015 at 9:49
Nov 8, 2015 at 21:12 history edited Mahdi Majidi-Zolbanin CC BY-SA 3.0
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Nov 8, 2015 at 17:54 history edited Mahdi Majidi-Zolbanin CC BY-SA 3.0
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Nov 8, 2015 at 17:45 history edited Mahdi Majidi-Zolbanin CC BY-SA 3.0
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Nov 8, 2015 at 17:28 history answered Mahdi Majidi-Zolbanin CC BY-SA 3.0