Talk:Givens rotation

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Givens Rotations are like school in the summertime: No Class.

-Michael Shea

[edit] Copysign

How can it be that the copysign function, which copies the sign of y to x, may be replaced by x*sign(y)? If x is negative, the result will be exactly the opposite sign of y. I suppose it should read: abs(x)*sign(y)

88.73.242.210 (talk) 14:31, 19 December 2007 (UTC)

In the examples in the code, x is sqrt(1+t*t) and thus always positive. -- Jitse Niesen (talk) 23:16, 19 December 2007 (UTC)