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  2. Bott periodicity theorem - Wikipedia

    en.wikipedia.org/wiki/Bott_periodicity_theorem

    In mathematics, the Bott periodicity theorem describes a periodicity in the homotopy groups of classical groups, discovered by Raoul Bott (1957, 1959), which proved to be of foundational significance for much further research, in particular in K-theory of stable complex vector bundles, as well as the stable homotopy groups of spheres.

  3. Periodicity - Wikipedia

    en.wikipedia.org/wiki/Periodicity

    Bott periodicity theorem, addresses Bott periodicity: a modulo-8 recurrence relation in the homotopy groups of classical groups; Periodic function, a function whose output contains values that repeat periodically; Periodic mapping

  4. Virasoro group - Wikipedia

    en.wikipedia.org/wiki/Virasoro_group

    In abstract algebra, the Virasoro group or Bott–Virasoro group (often denoted by Vir) [1] is an infinite-dimensional Lie group defined as the universal central extension of the group of diffeomorphisms of the circle. The corresponding Lie algebra is the Virasoro algebra, which has a key role in conformal field theory (CFT) and string theory.

  5. Bottom - Wikipedia

    en.wikipedia.org/wiki/Bottom

    Bottom element, in lattice theory and related branches of mathematics; Bottom type, in type theory (the bottom element in the subtype relation) The symbol up tack (⊥), used to represent these concepts

  6. Network synthesis filters - Wikipedia

    en.wikipedia.org/wiki/Network_synthesis_filters

    The class of a filter refers to the class of polynomials from which the filter is mathematically derived. The order of the filter is the number of filter elements present in the filter's ladder implementation. Generally speaking, the higher the order of the filter, the steeper the cut-off transition between passband and stopband.

  7. It's Been 21 Years Since “That” Shocking “Sex and the City ...

    www.aol.com/lifestyle/21-years-since-shocking...

    It's hard to believe one of Sex and the City's most shocking deaths is old enough to order itself a Cosmopolitan.. In a show full of unforgettable moments, season 6's episode 18, aptly titled ...

  8. Network synthesis - Wikipedia

    en.wikipedia.org/wiki/Network_synthesis

    A one-element-kind network is a trivial case, reducing to an impedance of a single element. A two-element-kind network (LC, RC, or RL) can be synthesised with Foster or Cauer synthesis. A three-element-kind network (an RLC network) requires more advanced treatment such as Brune or Bott-Duffin synthesis. [53]

  9. After visiting all 50 states, there are only 3 I'd choose to ...

    www.aol.com/news/visiting-50-states-only-3...

    I've spent time exploring all 50 US states. After doing so, there are three states I would choose to live in: New York, Rhode Island, and Wyoming.