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  2. Spider diagram - Wikipedia

    en.wikipedia.org/wiki/Spider_diagram

    A spider diagram is a boolean expression involving unitary spider diagrams and the logical symbols ,,. For example, it may consist of the conjunction of two spider diagrams, the disjunction of two spider diagrams, or the negation of a spider diagram.

  3. ZX-calculus - Wikipedia

    en.wikipedia.org/wiki/ZX-calculus

    ZX-diagrams consist of green and red nodes called spiders, which are connected by wires. Wires may curve and cross, arbitrarily many wires may connect to the same spider, and multiple wires can go between the same pair of nodes. There are also Hadamard nodes, usually denoted by a yellow box, which always connect to exactly two wires.

  4. Unitary group - Wikipedia

    en.wikipedia.org/wiki/Unitary_group

    In mathematics, the unitary group of degree n, denoted U(n), is the group of n × n unitary matrices, with the group operation of matrix multiplication.The unitary group is a subgroup of the general linear group GL(n, C), and it has as a subgroup the special unitary group, consisting of those unitary matrices with determinant 1.

  5. Radar chart - Wikipedia

    en.wikipedia.org/wiki/Radar_chart

    The radar chart is also known as web chart, spider chart, spider graph, spider web chart, star chart, [2] star plot, cobweb chart, irregular polygon, polar chart, or Kiviat diagram. [ 3 ] [ 4 ] It is equivalent to a parallel coordinates plot, with the axes arranged radially.

  6. Unitary representation - Wikipedia

    en.wikipedia.org/wiki/Unitary_representation

    In mathematics, a unitary representation of a group G is a linear representation π of G on a complex Hilbert space V such that π(g) is a unitary operator for every g ∈ G.The general theory is well-developed in the case that G is a locally compact topological group and the representations are strongly continuous.

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  8. Representation theory of finite groups - Wikipedia

    en.wikipedia.org/wiki/Representation_theory_of...

    In other words, the following diagram commutes for all : Such a map is also called –linear, or an equivariant map. The kernel, the image and the cokernel of are defined by default. The composition of equivariant maps is again an equivariant map.

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