Jon Simpson’s Weblog

For my own personal, later reference.

Check input, stop if f(a) * f(b) > 0

while (result not accurate enough)
	c = (a + b) / 2
	if (f(a) * f(c) > 0)
		a = c
	else
		b = c
	end if
end while

With an error band of |a - b| / 2

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