The Four-Colour Theorem

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oh god your way of teaching is energetic and interesting....

sreecharankowlali
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Wow I want teachers like him in my university ❤️

danzai
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I think that the "simplified" map is wrong, with germany not touching the check republic.

juanignaciolopeztellechea
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Hi there! What level are your students in?

nurpm
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What about 4 joined squares in a circle?! Still do with 4 colours?

edlaw