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  2. Topology - Wikipedia

    en.wikipedia.org/wiki/Topology

    A three-dimensional model of a figure-eight knot.The figure-eight knot is a prime knot and has an Alexander–Briggs notation of 4 1.. Topology (from the Greek words τόπος, 'place, location', and λόγος, 'study') is the branch of mathematics concerned with the properties of a geometric object that are preserved under continuous deformations, such as stretching, twisting, crumpling ...

  3. Topological algebra - Wikipedia

    en.wikipedia.org/wiki/Topological_algebra

    A topological algebra over a topological field is a topological vector space together with a bilinear multiplication :, (,) that turns into an algebra ...

  4. Algebraic topology - Wikipedia

    en.wikipedia.org/wiki/Algebraic_topology

    Algebraic topology is a branch of mathematics that uses tools from abstract algebra to study topological spaces. The basic goal is to find algebraic invariants that classify topological spaces up to homeomorphism , though usually most classify up to homotopy equivalence .

  5. Mapping class group of a surface - Wikipedia

    en.wikipedia.org/wiki/Mapping_class_group_of_a...

    It is a finitely generated, torsion-free subgroup [20] and its study is of fundamental importance for its bearing on both the structure of the mapping class group itself (since the arithmetic group ⁡ is comparatively very well understood, a lot of facts about ⁡ boil down to a statement about its Torelli subgroup) and applications to 3 ...

  6. Topological space - Wikipedia

    en.wikipedia.org/wiki/Topological_space

    In mathematics, a topological space is, roughly speaking, a geometrical space in which closeness is defined but cannot necessarily be measured by a numeric distance.More specifically, a topological space is a set whose elements are called points, along with an additional structure called a topology, which can be defined as a set of neighbourhoods for each point that satisfy some axioms ...

  7. Real analysis - Wikipedia

    en.wikipedia.org/wiki/Real_analysis

    Many of the theorems of real analysis are consequences of the topological properties of the real number line. The order properties of the real numbers described above are closely related to these topological properties. As a topological space, the real numbers has a standard topology, which is the order topology induced by order <.

  8. Topology and Its Applications - Wikipedia

    en.wikipedia.org/wiki/Topology_and_its_Applications

    It was established in 1971 as General Topology and Its Applications, and renamed to its current title in 1980. The journal currently publishes 18 issues each year in one volume. It is indexed by Scopus, Mathematical Reviews, and Zentralblatt MATH. Its 2004–2008 MCQ was 0.38 and its 2020 impact factor was 0.617. [1]

  9. Algebraic topology (object) - Wikipedia

    en.wikipedia.org/wiki/Algebraic_topology_(object)

    This terminology is often used in the case of the algebraic topology on the set of discrete, faithful representations of a Kleinian group into PSL(2,C). Another topology, the geometric topology (also called the Chabauty topology ), can be put on the set of images of the representations, and its closure can include extra Kleinian groups that are ...