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Nov 22, 2019 at 21:10 vote accept yhb
Nov 22, 2019 at 8:43 comment added yhb @GerryMyerson, Thank you for help!
Nov 22, 2019 at 8:20 vote accept yhb
Nov 22, 2019 at 8:23
Nov 22, 2019 at 4:23 history edited GH from MO
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Nov 22, 2019 at 4:21 answer added GH from MO timeline score: 12
Nov 21, 2019 at 22:12 comment added Gerry Myerson It may help to note $(-3\mid r)=(r\mid3)$ is $1$ if $r\equiv1\bmod3$, $-1$ if $r\equiv2\bmod3$.
Nov 21, 2019 at 14:36 history asked yhb CC BY-SA 4.0