Euler akawana huwandu chaihwo hweiyi nhevedzano (muchimiro chakavharwa), pamwe neuchapupu hwekuti huwandu uhu hwakarurama. Euler akawana huwandu chaihwo hwaive π2/6 uye akazivisa kuwanikwa uku muna 1735. Nharo dzake dzaive dzakavakirwa pakugadzirisa kwakanga kusina kururamiswa panguva iyoyo, kunyange zvazvo akazoonekwa kuti akarurama, uye kwete kusvikira 1741 kuti akakwanisa kuburitsa humbowo hwakasimba. Mubvunzo: Chii chiri huwandu hwechinetso?
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