| 21. | It looks like a hyperbola, which puzzles me after reading the article.
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| 22. | One directrix and its focus is enough to produce both arms of the hyperbola.
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| 23. | In the hyperbola case of, the hyperbola is degenerate if and only if.
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| 24. | In the hyperbola case of, the hyperbola is degenerate if and only if.
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| 25. | Because of this interrelationship, the set of possible steady states forms a hyperbola:
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| 26. | :Most functions that asymptotically approach zero have nothing to do with a hyperbola.
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| 27. | These hyperbola share the same axis and asymptotes.
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| 28. | Thus there is a 2-way classification : ellipse / hyperbola and parabola.
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| 29. | This is the equation of the hyperbola above.
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| 30. | The intersection of a line and a parabola or hyperbola may be treated analogously.
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