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Timeline for Formal criterion of flatness

Current License: CC BY-SA 3.0

2 events
when toggle format what by license comment
Dec 21, 2013 at 20:36 comment added Todd Trimble I confess that both the mathematics and the joke go over my head. What does 'x' and the asterisk before it signify? Maybe it would help if this were LaTeXed?
Dec 21, 2013 at 17:27 history answered answer_bot CC BY-SA 3.0