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(a touch of class)
I don't know r.opalka. who is this man?is he some famous mathematician?
http://en.wikipedia.org/wiki/Roman_Opalka
I don't know r.opalka. who is this man?is he some famous mathematician?
BeantwoordenVerwijderenhttp://en.wikipedia.org/wiki/Roman_Opalka
BeantwoordenVerwijderen