wheel graph

The wheel graph of $n$ vertices $W_{n}$ is a graph that contains a cycle of length $n-1$ plus a vertex $v$ (sometimes called the hub) not in the cycle such that $v$ is connected to every other vertex. The edges connecting $v$ to the rest of the graph are sometimes called spokes.

$W_{4}$ :

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$W_{6}$ :

\\xymatrix{&&A\\ar@{-}[d]\\ar@{-}[drr]&&\\\\E\\ar@{-}[rr]\\ar@{-}[urr]&&F&&B\\ar@{-}[ll]\\ar@{-}[dl]\\\\&D\\ar@{-}[ur]\\ar@{-}[ul]&&C\\ar@{-}[ul]\\ar@{-}[ll]&\\\\}

随便看

proof for one equivalent statement of Baire category theorem
ProofOfAAAhyperbolic
proof of AAA (hyperbolic)
ProofOfAbelLemmabyExpansion
proof of Abel lemma (by expansion)
ProofOfAbelsConvergenceTheorem
ProofOfAbelsLemmabyInduction
ProofOfAbelsLimitTheorem
ProofOfAbelsTestForConvergence
proof of Abel’s convergence theorem
proof of Abel’s lemma (by induction)
proof of Abel’s limit theorem
proof of Abel’s test for convergence
ProofOfAbsoluteConvergenceImpliesConvergenceForAnInfiniteProduct
proof of absolute convergence implies convergence for an infinite product
ProofOfAbsoluteConvergenceTheorem
proof of absolute convergence theorem
ProofOfACorollaryToEulerFermatTheorem
proof of a corollary to Euler-Fermat theorem
ProofOfAdditionFormulaOfExp
proof of addition formula of exp
ProofOfAdditiveFormOfHilbertsTheorem90
proof of additive form of Hilbert’s theorem 90
ProofOfAlgebraicIndependenceOfElementarySymmetricPolynomials
proof of algebraic independence of elementary symmetric polynomials

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