In Larry Niven's fictional Known Space universe, the Thrintun (singular Thrint) were a long-extinct species which ruled the galaxy through telepathic mind control.
The Thrintun were destroyed about 2 billion years before the human era, in a story partially told in the novella World of Ptavvs[?].
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... equation, because it discriminates between three qualitatively different cases:
If the discriminant is zero, then there is a repeated solution x, and th ...