| 11. | A curve " C " has at most a finite number of singular points.
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| 12. | For example, a conic section is degenerate if and only if it has singular points.
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| 13. | :: Check whether the Hessian matrix is positive definite at the singular point or not.
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| 14. | Every second-order linear ODE with three regular singular points can be transformed into this equation.
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| 15. | That theory is too limited for algebraic surfaces, and even for curves with singular points.
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| 16. | Creekologists also placed wells on singular points of a territory in accordance with landscape features.
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| 17. | Consequently the singular points of this function occur at
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| 18. | As most such systems have no solution, many surfaces do not have any singular point.
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| 19. | The singular points of " V " are those where the'test to be a manifold'fails.
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| 20. | In the figure above the point where the two blue curves cross is a singular point.
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