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  2. PSA TU engine - Wikipedia

    en.wikipedia.org/wiki/PSA_TU_engine

    The TU engine is distantly related to the older X-Type engine — sharing a similar overhead camshaft architecture, but the key differences are the belt driven camshaft (the X is chain driven), and that the TU is mounted in a conventional upright position with a separate, end-on mounted transmission and unequal length drive shafts.

  3. Mostow rigidity theorem - Wikipedia

    en.wikipedia.org/wiki/Mostow_rigidity_theorem

    The theorem was proven for closed manifolds by Mostow and extended to finite volume manifolds by Marden (1974) in 3 dimensions, and by Prasad in all dimensions at least 3. Gromov (1981) gave an alternate proof using the Gromov norm. Besson, Courtois & Gallot (1996) gave the simplest available proof.

  4. Thom space - Wikipedia

    en.wikipedia.org/wiki/Thom_space

    The embedded manifold together with the isomorphism class of the normal bundle actually encodes the same information as the cobordism class []. This can be shown [ 2 ] by using a cobordism W {\displaystyle W} and finding an embedding to some R N W + n × [ 0 , 1 ] {\displaystyle \mathbb {R} ^{N_{W}+n}\times [0,1]} which gives a homotopy class ...

  5. Exterior calculus identities - Wikipedia

    en.wikipedia.org/wiki/Exterior_calculus_identities

    The boundary of a manifold is a manifold , which has dimension . An orientation on M {\displaystyle M} induces an orientation on ∂ M {\displaystyle \partial M} . We usually denote a submanifold by Σ ⊂ M {\displaystyle \Sigma \subset M} .

  6. Transversality theorem - Wikipedia

    en.wikipedia.org/wiki/Transversality_theorem

    We require that the family vary smoothly by assuming to be a (smooth) manifold and to be smooth. The statement of the parametric transversality theorem is: Suppose that F : X × S → Y {\displaystyle F\colon X\times S\rightarrow Y} is a smooth map of manifolds, where only X {\displaystyle X} has boundary, and let Z {\displaystyle Z} be any ...

  7. Calculus on Manifolds (book) - Wikipedia

    en.wikipedia.org/wiki/Calculus_on_Manifolds_(book)

    Calculus on Manifolds is a brief monograph on the theory of vector-valued functions of several real variables (f : R n →R m) and differentiable manifolds in Euclidean space. . In addition to extending the concepts of differentiation (including the inverse and implicit function theorems) and Riemann integration (including Fubini's theorem) to functions of several variables, the book treats ...

  8. Preimage theorem - Wikipedia

    en.wikipedia.org/wiki/Preimage_theorem

    In mathematics, particularly in the field of differential topology, the preimage theorem is a variation of the implicit function theorem concerning the preimage of particular points in a manifold under the action of a smooth map. [1] [2]

  9. Twisted Poincaré duality - Wikipedia

    en.wikipedia.org/wiki/Twisted_Poincaré_duality

    Download as PDF; Printable version; ... For M a compact manifold, ... Tu, Loring W. (1982). Differential forms in algebraic topology.