Word: ceulen
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...Dutch mathematician Ludolph van Ceulen is chiefly known for his computations of the value of pi, which he carried to 35 decimal places. This value was inscribed on his tombstone...
...Sixteenth letter of the Greek alphabet, used by mathematicians as a symbol for the ratio of the circumference of a circle to its diameter. It is sometimes called the Ludolphian number, after Ludolph von Ceulen who computed its value late in the 16th Century...
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