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Updated: July 25, 2026
"I am going to demonstrate that all kinds of orthogonal surfaces in which the three systems are isothermal, are 1st, those of the superficies of the second order; 2nd, those of the ellipsoides of revolution around the small axis and the grand axis; 3rd, those but no," said the madman, reflecting, "I will commence with him on the planetary system."
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