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  1. Envelopes of Geodesics on Ellipsoids

    Given a family of curves, an " envelope " of the family is a curve which is at some point tangent to every curve in the family. An intuitive example of an envelope consists of a family of lines in $\mathbb{R}^2$, whose envelope is a parabola...

    barkera - 2015-09-12 12:04

  2. Singularities on Cubic Surfaces

    Rodenberg's Classification of Singularities ...

    barkera - 2015-09-10 15:56

  3. Steiner's Surface

    Recall the discussion of double points on quartics from Quartics with Tetrahedral Symmetry . Kummer showed [1] that such surfaces paramaterised by $\lambda, \mu$ have 16 double points (counting those in complex projective space) when $...

    barkera - 2015-09-11 16:38

  4. B is for Bayesian Inference

    ... Stat Life . Please contact us for feedback and comments about this page. Last update on 7 June ... offers you a new test for a rare disease. Only about 2.5% of people have it, but it’s best to be reassured. The test is good: it has 80% ...

    augustyn - 2018-06-07 13:55

  5. The Bohemian Dome

    Models X 4 and X 9 are constructed in similar ways - by tracing the points through which a moving circle passes. ...

    barkera - 2015-09-11 16:34

  6. Asymptotic Curves

    Many of our surfaces of revolution exhibit "asymptotic curves" (also referred to as "asymptotic lines"). These are defined in an analogous manner to geodesics . A geodesic has constant zero  geodesic curvature , while an asymptotic curve...

    barkera - 2015-09-12 12:30

  7. Constant Mean Curvature Surfaces

    The " mean curvature " at a point on a surface is defined as the average $(\kappa_{1} + \kappa_{2})/2$ of its two principal curvatures . We can construct surfaces of revolution of constant mean curvature by rotating a special type of...

    barkera - 2015-09-12 12:24

  8. Hessian Surfaces

    Brief introduction to Hessians ...

    barkera - 2015-09-10 15:51

  9. Constant Negative Curvature Surfaces of Revolution

    Constant Negative Curvature ...

    barkera - 2015-09-12 12:19

  10. Mathematics and Statistics

    ... (10^12 bytes) on a 7.2cm by 2.7cm stick). As data is cheap, people (and companies) start collecting it and in order to do any meaningful ... 2009--2013. Please contact us for feedback and comments about this page. Last update on 17 ...

    munro - 2018-07-16 11:55

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