in reply to Re^3: Seeing if two numbers have the same sign ($x / abs $x)
in thread Seeing if two numbers have the same sign

arg, eyes are getting old. You are absolutely right. I was thinking of the "trick" people had described about taking the product and checking if positive; you are indeed normalizing the vectors and checking for equality.
  • Comment on Re^4: Seeing if two numbers have the same sign ($x / abs $x)

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