BBP and Bellard's formula

This is a discussion on BBP and Bellard's formula within the A Brief History of Cprogramming.com forums, part of the Community Boards category; if what I'm hearing is correct, doesn't the existance of these two formulas make pi rational....

  1. #1
    Registered User Scourfish's Avatar
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    BBP and Bellard's formula

    if what I'm hearing is correct, doesn't the existance of these two formulas make pi rational.

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    I don't know what the formulas are, but how can you make in irrational number rational?

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    This formula makes it possible to calculate the n-th digit of pi if n is smaller than or equal to 1000, without having to know the former digits. But that doesn't imply that it makes pi a rational number. A number is rational if it can be written as a fraction, N/M. There are methods to approximate pi very well as a fraction, so perhaps it is a near-rational number.

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