When I woke, my son greeted me with a proposed counterexample to the Four Colour Theorem.
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When I woke, my son greeted me with a proposed counterexample to the Four Colour Theorem. He said he’d woken with the idea.
He’d made this map of seven regions where the two that are brown here are discontiguous parts of the same country, as are the blues. This isn’t covered by the FCT, but still - what a thing for a 10 year old to come up with! #tmwyk
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When I woke, my son greeted me with a proposed counterexample to the Four Colour Theorem. He said he’d woken with the idea.
He’d made this map of seven regions where the two that are brown here are discontiguous parts of the same country, as are the blues. This isn’t covered by the FCT, but still - what a thing for a 10 year old to come up with! #tmwyk
@peterrowlett Great combination of mathematical insight and knowledge of geopolitical reality!
He might enjoy being introduced to the unsolved version called the Earth-Moon problem, where each country has a moon colony… https://en.wikipedia.org/wiki/Earth–Moon_problem
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When I woke, my son greeted me with a proposed counterexample to the Four Colour Theorem. He said he’d woken with the idea.
He’d made this map of seven regions where the two that are brown here are discontiguous parts of the same country, as are the blues. This isn’t covered by the FCT, but still - what a thing for a 10 year old to come up with! #tmwyk
@peterrowlett oh wow. Pretty sure exclaves aren't contemplated in a graph representation, but this is brilliant.
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Gli ultimi otto messaggi ricevuti dalla Federazione
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@thatgiga @oblomov @ju @matz a me piaceva il tofu preso al ristorante (di solito nelle zuppe)
ma non ho mai capito quale fosse l'incantamento corretto per trasformare quella cosa insulsa che trovi al supermercato in qualcosa di buono :D
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@repubblica @economia-la-repubblica-repubblica schifosi tutto con le nostre bollette
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@justine ahah I wish I had.
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@indyradio no, I haven't. Those were some routers but the supplier wasn't able to deliver all of them
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@dmoonfire maybe you peeked unconsciously
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Peccato che Signal non lo usi nessuno dei miei contatti.
