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יוֺם פּײַ | On the Rabbinical Approximation of π, by Boaz Tsaban and David Garber (1998)

There is a Rabbinical tradition that the value of pi is hidden within a ktiv-kri (reading-versus-writing disparity) in I Kings 7:23. According to Hebrew scriptural tradition, the word meaning ‘line’ is written as קוה, but read as קו. . . .