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  2. Topological group - Wikipedia

    en.wikipedia.org/wiki/Topological_group

    The real numbers form a topological group under addition. In mathematics, topological groups are the combination of groups and topological spaces, i.e. they are groups and topological spaces at the same time, such that the continuity condition for the group operations connects these two structures together and consequently they are not independent from each other.

  3. Periodic table of topological insulators and topological ...

    en.wikipedia.org/wiki/Periodic_table_of...

    It indicates the mathematical group for the topological invariant of the topological insulators and topological superconductors, given a dimension and discrete symmetry class. [1] The ten possible discrete symmetry families are classified according to three main symmetries: particle-hole symmetry , time-reversal symmetry and chiral symmetry .

  4. Topological order - Wikipedia

    en.wikipedia.org/wiki/Topological_order

    In physics, topological order [1] is a kind of order in the zero-temperature phase of matter (also known as quantum matter). Macroscopically, topological order is defined and described by robust ground state degeneracy [ 2 ] and quantized non-abelian geometric phases of degenerate ground states. [ 1 ]

  5. Topology (chemistry) - Wikipedia

    en.wikipedia.org/wiki/Topology_(chemistry)

    In chemistry, topology provides a way of describing and predicting the molecular structure within the constraints of three-dimensional (3-D) space. Given the determinants of chemical bonding and the chemical properties of the atoms, topology provides a model for explaining how the atoms ethereal wave functions must fit together.

  6. General topology - Wikipedia

    en.wikipedia.org/wiki/General_topology

    The Topologist's sine curve, a useful example in point-set topology.It is connected but not path-connected. In mathematics, general topology (or point set topology) is the branch of topology that deals with the basic set-theoretic definitions and constructions used in topology.

  7. Balanced group - Wikipedia

    en.wikipedia.org/wiki/Balanced_group

    The completion of a balanced group with respect to its uniform structure admits a unique topological group structure extending that of .This generalizes the case of abelian groups and is a special case of the two-sided completion of an arbitrary topological group, which is with respect to the coarsest uniform structure finer than both the left and the right uniform structures.

  8. Category:Topological groups - Wikipedia

    en.wikipedia.org/wiki/Category:Topological_groups

    In mathematics, a topological group G is a group that is also a topological space such that the group multiplication G × G→G and the inverse operation G→G are continuous maps. Subcategories This category has the following 2 subcategories, out of 2 total.

  9. 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 ...