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when toggle format what by license comment
Oct 16, 2017 at 15:41 history edited user87745 CC BY-SA 3.0
added 25 characters in body
Oct 16, 2017 at 15:41 comment added user87745 @knzhou Yes, of course. I will make it explicit. Thanks for pointing it out.
Oct 16, 2017 at 15:37 comment added knzhou "When the symbols are non-zero, it is always possible to find a coordinate transformation that makes the symbol zero..." You mean only locally zero, right?
Oct 16, 2017 at 14:06 history answered user87745 CC BY-SA 3.0