Analysis of information sources in references of the Wikipedia article "Ellipse" in English language version.
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: CS1 maint: location missing publisher (link)We present a detailed analysis of Ramanujan's most accurate approximation to the perimeter of an ellipse.In particular, the second equation underestimates the circumference by where is an increasing function of
the relative error when b = 1 and a varies ... is bound by 4/π − 14/11 = 0.00051227….
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: ISBN / Date incompatibility (help)