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Trident curves are cubic plane curves with an ordinary double point in the real projective plane at x = 0, y = 1, z = 0; if we substitute x = x/z and y = 1/z into the equation of the trident curve, we get
- J. Dennis Lawrence (1972). A catalog of special plane curves. Dover Publications. p. 110. ISBN 0-486-60288-5.
- O'Connor, John J.; Robertson, Edmund F., "Trident of Newton", MacTutor History of Mathematics archive, University of St Andrews.
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