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Dec 14, 2020 at 16:18 comment added Chris Leary @GordonRoyle - I completely agree.
Dec 14, 2020 at 8:57 comment added Gordon Royle I think it safe to assume that the OP will weigh our suggestions against all the non-mathematical gift options that he/she can evaluate without our assistance.
S Dec 14, 2020 at 1:04 history answered Chris Leary CC BY-SA 4.0
S Dec 14, 2020 at 1:04 history made wiki Post Made Community Wiki by Chris Leary