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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. Manifold - Wikipedia

    en.wikipedia.org/wiki/Manifold

    Download as PDF; Printable version; ... a manifold is a topological space that locally resembles Euclidean space near each point. ... Tu, Loring W. (2011). ...

  4. Loring W. Tu - Wikipedia

    en.wikipedia.org/wiki/Loring_W._Tu

    Tu is a younger brother of Charles Tu, who is a professor of electrical and computer engineering (ECE) at the University of California, San Diego. [5] [6] He also has another brother, Tu Xiang; all siblings became academics. [7] During his childhood, Tu was largely raised by his grandfather.

  5. BMW N62 - Wikipedia

    en.wikipedia.org/wiki/BMW_N62

    The N62 was a clean sheet design and not a direct evolution of the M60 engine line that evolved into the M62 engine. The N62 4.4L has a bore of 92 mm (3.6 in) and stroke of 82.7 mm (3.26 in) for a total displacement of 4,398cc and features double-VANOS variable valve timing on both the intake and exhaust camshafts (the M62 features variable valve timing on only the intake camshaft). [7]

  6. 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} .

  7. BMW M54 - Wikipedia

    en.wikipedia.org/wiki/BMW_M54

    The BMW M54 is a naturally aspirated straight-6 DOHC petrol engine produced from 2000 to 2006. It was released in the E53 X5 [1] and is the replacement for the M52 engine. The S54 is the equivalent high performance engine, used in the E46 M3, the Z3 M Coupé/Roadster and the E85/E86 Z4 M.

  8. Tubular neighborhood - Wikipedia

    en.wikipedia.org/wiki/Tubular_neighborhood

    In mathematics, a tubular neighborhood of a submanifold of a smooth manifold is an open set around it resembling the normal bundle. The idea behind a tubular neighborhood can be explained in a simple example. Consider a smooth curve in the plane without self-intersections. On each point on the curve draw a line perpendicular to the curve ...

  9. 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 ...