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Aug 8, 2015 at 15:20 history edited Jim Bryan CC BY-SA 3.0
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Aug 8, 2015 at 14:59 comment added Jim Bryan @Noam. My attempt to find such lines explicitly led me to the statement about conics which seemed to be the easiest place to corroborate or disprove my argument. Given Jason's argument, it looks like there must be mistakes in my $\overline{M}_2$ argument.
Aug 8, 2015 at 13:43 comment added Noam D. Elkies Did you try to find such a line explicitly for "random" nodal $C$? This could corroborate or disprove an argument by intersection theory so "tricky [that] it is possible we are marking mistakes".
Aug 8, 2015 at 6:03 answer added Jason Starr timeline score: 5
Aug 8, 2015 at 0:18 history asked Jim Bryan CC BY-SA 3.0