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  2. Branch point - Wikipedia

    en.wikipedia.org/wiki/Branch_point

    A common choice of branch cut is the negative real axis, although the choice is largely a matter of convenience. The logarithm has a jump discontinuity of 2 π i when crossing the branch cut. The logarithm can be made continuous by gluing together countably many copies, called sheets, of the complex plane along the branch cut. On each sheet ...

  3. Lambert W function - Wikipedia

    en.wikipedia.org/wiki/Lambert_W_function

    The branch point for the principal branch is at z = − ⁠ 1 / e ⁠, with a branch cut that extends to −∞ along the negative real axis. This branch cut separates the principal branch from the two branches W −1 and W 1. In all branches W k with k ≠ 0, there is a branch point at z = 0 and a branch cut along the entire negative real axis.

  4. Mazda Z engine - Wikipedia

    en.wikipedia.org/wiki/Mazda_Z_engine

    The Z5 engine was introduced as the first of a newer line of Mazda Z-series engines. The Z series was a new design based on the B-series block, block internals and oil-pan and a different DOHC head. [1] Early versions of this motor had a chain driven exhaust cam. The block is cast iron, the oil-pan is a 2-piece design with an upper aluminum and ...

  5. Nissan Z engine - Wikipedia

    en.wikipedia.org/wiki/Nissan_Z_engine

    All Z engines had 4 cylinders, a total of 8 valves and a single overhead camshaft . Displacements ranged from 1.6 L to 2.4 L.The Z series' engine blocks were nearly identical to those of the earlier L Series with the exception of the Z24. While the Z16 and Z18 engines had a deck height similar to the earlier L13/L14/L16/L18 variants, the Z24 ...

  6. Motor oil - Wikipedia

    en.wikipedia.org/wiki/Motor_oil

    An oil pump, a vane or gear pump powered by the engine, pumps the oil throughout the engine, including the oil filter. Oil filters can be a full flow or bypass type. In the crankcase of a vehicle engine, motor oil lubricates rotating or sliding surfaces between the crankshaft journal bearings (main bearings and big-end bearings) and rods ...

  7. Complex logarithm - Wikipedia

    en.wikipedia.org/wiki/Complex_logarithm

    A single branch of the complex logarithm. The hue of the color is used to show the argument of the complex logarithm. The brightness of the color is used to show the modulus of the complex logarithm. The real part of log(z) is the natural logarithm of | z |. Its graph is thus obtained by rotating the graph of ln(x) around the z-axis.

  8. Contour integration - Wikipedia

    en.wikipedia.org/wiki/Contour_integration

    However, the important thing to note is that z 1/2 = e (Log z)/2, so z 1/2 has a branch cut. This affects our choice of the contour C. Normally the logarithm branch cut is defined as the negative real axis, however, this makes the calculation of the integral slightly more complicated, so we define it to be the positive real axis.

  9. GM Family Z engine - Wikipedia

    en.wikipedia.org/wiki/GM_Family_Z_engine

    GM Family B engine Family Z is a turbocharged common rail diesel engine produced by General Motors Korea since 2010. It replaced VM Motori RA 420 diesel engine in a number of GM applications, such as the diesel versions of vehicles sold as Chevrolet made for North America, Daewoo made for Korea, Opel made for Europe and Holden made for Australia.