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The Quốc âm thi tập (國音詩集 "National pronunciation poetry collection") [a] is a collection of Vietnamese poetry written in the vernacular chữ Nôm script attributed to Nguyễn Trãi (chữ Hán: 阮廌). The collection of 254 poems was traditionally written after Nguyễn Trãi's retirement from court life. [1]
In the 1760s, Johann Heinrich Lambert was the first to prove that the number π is irrational, meaning it cannot be expressed as a fraction /, where and are both integers. ...