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  2. Degree of a continuous mapping - Wikipedia

    en.wikipedia.org/wiki/Degree_of_a_continuous_mapping

    A degree two map of a sphere onto itself.. In topology, the degree of a continuous mapping between two compact oriented manifolds of the same dimension is a number that represents the number of times that the domain manifold wraps around the range manifold under the mapping.

  3. k-graph C*-algebra - Wikipedia

    en.wikipedia.org/wiki/K-graph_C*-algebra

    In this case the degree map takes a path to its length. By extension, k {\displaystyle k} -graphs can be considered higher-dimensional analogs of directed graphs. Another way to think about a k {\displaystyle k} -graph is as a k {\displaystyle k} -colored directed graph together with additional information to record the factorization property.

  4. Topological degree theory - Wikipedia

    en.wikipedia.org/wiki/Topological_degree_theory

    In mathematics, topological degree theory is a generalization of the winding number of a curve in the complex plane. It can be used to estimate the number of solutions of an equation, and is closely connected to fixed-point theory. When one solution of an equation is easily found, degree theory can often be used to prove existence of a second ...

  5. Veronese surface - Wikipedia

    en.wikipedia.org/wiki/Veronese_surface

    The Veronese surface arises naturally in the study of conics.A conic is a degree 2 plane curve, thus defined by an equation: + + + + + = The pairing between coefficients (,,,,,) and variables (,,) is linear in coefficients and quadratic in the variables; the Veronese map makes it linear in the coefficients and linear in the monomials.

  6. Planar graph - Wikipedia

    en.wikipedia.org/wiki/Planar_graph

    When at most three regions meet at a point, the result is a planar graph, but when four or more regions meet at a point, the result can be nonplanar (for example, if one thinks of a circle divided into sectors, with the sectors being the regions, then the corresponding map graph is the complete graph as all the sectors have a common boundary ...

  7. Dying To Be Free - The Huffington Post

    projects.huffingtonpost.com/dying-to-be-free...

    The last image we have of Patrick Cagey is of his first moments as a free man. He has just walked out of a 30-day drug treatment center in Georgetown, Kentucky, dressed in gym clothes and carrying a Nike duffel bag.

  8. Here’s where the weather could disrupt New Year’s Eve ...

    www.aol.com/where-weather-could-disrupt-eve...

    The 2025 New Year’s Eve numerals are seen on display in Times Square on December 18 in New York City. (Michael M. Santiago/Getty Images)

  9. Covering space - Wikipedia

    en.wikipedia.org/wiki/Covering_space

    Gimbal lock occurs because any map T 3 → RP 3 is not a covering map. In particular, the relevant map carries any element of T 3, that is, an ordered triple (a,b,c) of angles (real numbers mod 2 π), to the composition of the three coordinate axis rotations R x (a)∘R y (b)∘R z (c) by those angles, respectively.