| 21. | This technique measures the depth only a singular point at a time, and is therefore inefficient.
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| 22. | This is optimal, as the branch cuts must connect the singular points and to the infinity.
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| 23. | Otherwise, the singular points may form a curve.
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| 24. | Therefore, the singular points are the solutions of a system of four equations in three indeterminates.
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| 25. | What happens at a singular point of X?
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| 26. | A singular point is isolated if there is no other singular point in a neighborhood of it.
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| 27. | Furthermore, the non-wandering set of the system is precisely the union of singular points and periodic orbits.
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| 28. | The generalization of this equation to three arbitrary regular singular points is given by Riemann's differential equation.
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| 29. | There is another kind of singular points.
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| 30. | Let S be a translation surface as defined above and \ Sigma the set of singular points.
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