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  2. Hyperbolic geometry - Wikipedia

    en.wikipedia.org/wiki/Hyperbolic_geometry

    Compared to Euclidean geometry, hyperbolic geometry presents many difficulties for a coordinate system: the angle sum of a quadrilateral is always less than 360°; there are no equidistant lines, so a proper rectangle would need to be enclosed by two lines and two hypercycles; parallel-transporting a line segment around a quadrilateral causes ...

  3. Constructions in hyperbolic geometry - Wikipedia

    en.wikipedia.org/wiki/Constructions_in...

    Hyperbolic geometry is a non-Euclidean geometry where the first four axioms of Euclidean geometry are kept but the fifth axiom, the parallel postulate, is changed. The fifth axiom of hyperbolic geometry says that given a line L and a point P not on that line, there are at least two lines passing through P that are parallel to L. [1]

  4. Hyperbolic motion - Wikipedia

    en.wikipedia.org/wiki/Hyperbolic_motion

    The idea of reducing geometry to its characteristic group was developed particularly by Mario Pieri in his reduction of the primitive notions of geometry to merely point and motion. Hyperbolic motions are often taken from inversive geometry : these are mappings composed of reflections in a line or a circle (or in a hyperplane or a hypersphere ...

  5. Poincaré half-plane model - Wikipedia

    en.wikipedia.org/wiki/Poincaré_half-plane_model

    The metric of the model on the half-plane, { , >}, is: = + ()where s measures the length along a (possibly curved) line. The straight lines in the hyperbolic plane (geodesics for this metric tensor, i.e., curves which minimize the distance) are represented in this model by circular arcs perpendicular to the x-axis (half-circles whose centers are on the x-axis) and straight vertical rays ...

  6. Hyperbolic metric space - Wikipedia

    en.wikipedia.org/wiki/Hyperbolic_metric_space

    The hyperbolic plane (and more generally any Hadamard manifolds of sectional curvature) is -hyperbolic. If we scale the Riemannian metric by a factor λ > 0 {\displaystyle \lambda >0} then the distances are multiplied by λ {\displaystyle \lambda } and thus we get a space that is λ ⋅ δ {\displaystyle \lambda \cdot \delta } -hyperbolic.

  7. 5 things to know about Dr. Oz, Trump’s pick to oversee ...

    www.aol.com/5-things-know-dr-oz-212159812.html

    During the early days of the COVID-19 pandemic, Oz lobbied the Trump administration to rush trials of the antimalarial drug hydroxychloroquine to treat the virus. ... “If Dr. Oz is about ...

  8. What to know about Dr. Oz as Trump picks him to lead Centers ...

    www.aol.com/know-dr-oz-trump-picks-020042187.html

    Oz began his TV career as a health expert on "The Oprah Winfrey Show" before launching "The Dr. Oz Show," which ran from 2009 to 2022. The show ended when Oz launched an unsuccessful bid for the U ...

  9. Borromean rings - Wikipedia

    en.wikipedia.org/wiki/Borromean_rings

    Although hyperbolic links are now considered plentiful, the Borromean rings were one of the earliest examples to be proved hyperbolic, in the 1970s, [33] [34] and this link complement was a central example in the video Not Knot, produced in 1991 by the Geometry Center. [35] Hyperbolic manifolds can be decomposed in a canonical way into gluings ...