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  2. Exact differential - Wikipedia

    en.wikipedia.org/wiki/Exact_differential

    An exact differential is sometimes also called a total differential, or a full differential, or, in the study of differential geometry, it is termed an exact form. The integral of an exact differential over any integral path is path-independent, and this fact is used to identify state functions in thermodynamics.

  3. Route of the Oregon Trail - Wikipedia

    en.wikipedia.org/wiki/Route_of_the_Oregon_Trail

    Today's Idaho State Route 78 roughly follows the path of the South Alternate route of the Oregon Trail. In 1869 the Central Pacific established Kelton, Utah as a railhead and the terminus of the western mail was moved from Salt Lake City. The Kelton Road became important as a communication and transportation road to the Boise Basin. [39]

  4. Closed and exact differential forms - Wikipedia

    en.wikipedia.org/wiki/Closed_and_exact...

    In mathematics, especially vector calculus and differential topology, a closed form is a differential form α whose exterior derivative is zero (dα = 0), and an exact form is a differential form, α, that is the exterior derivative of another differential form β. Thus, an exact form is in the image of d, and a closed form is in the kernel of d.

  5. Inexact differential - Wikipedia

    en.wikipedia.org/wiki/Inexact_differential

    The difference between initial and final states of the system's internal energy does not account for the extent of the energy interactions transpired. Therefore, internal energy is a state function (i.e. exact differential), while heat and work are path functions (i.e. inexact differentials) because integration must account for the path taken.

  6. Shortest path problem - Wikipedia

    en.wikipedia.org/wiki/Shortest_path_problem

    Shortest path (A, C, E, D, F) between vertices A and F in the weighted directed graph. In graph theory, the shortest path problem is the problem of finding a path between two vertices (or nodes) in a graph such that the sum of the weights of its constituent edges is minimized.

  7. Path (graph theory) - Wikipedia

    en.wikipedia.org/wiki/Path_(graph_theory)

    A three-dimensional hypercube graph showing a Hamiltonian path in red, and a longest induced path in bold black. In graph theory, a path in a graph is a finite or infinite sequence of edges which joins a sequence of vertices which, by most definitions, are all distinct (and since the vertices are distinct, so are the edges).

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  9. N-slit interferometric equation - Wikipedia

    en.wikipedia.org/wiki/N-slit_interferometric...

    where k is the wavenumber, and L m and L m − 1 represent the exact path differences. Here the Dirac–Duarte (DD) interferometric equation is a probability distribution that is related to the intensity distribution measured experimentally. [6] The calculations are performed numerically. [5]