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The Basel problem is a problem in mathematical analysis with relevance to number theory, concerning an infinite sum of inverse squares.It was first posed by Pietro Mengoli in 1650 and solved by Leonhard Euler in 1734, [1] and read on 5 December 1735 in The Saint Petersburg Academy of Sciences. [2]
Minh Mạng (Hanoi: [mïŋ˧ maːŋ˧˨ʔ]), also known as Minh Mệnh (Hanoi: [mïŋ˧ məjŋ̟˧˨ʔ], chữ Hán: 明 命, lit. "the bright favour of Heaven"; [1] 25 May 1791 – 20 January 1841; born Nguyễn Phúc Đảm, also known as Nguyễn Phúc Kiểu) was the second emperor of the Nguyễn dynasty of Vietnam, reigning from 14 ...