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  2. Riemann solver - Wikipedia

    en.wikipedia.org/wiki/Riemann_solver

    Definition. Generally speaking, Riemann solvers are specific methods for computing the numerical flux across a discontinuity in the Riemann problem. They form an important part of high-resolution schemes; typically the right and left states for the Riemann problem are calculated using some form of nonlinear reconstruction, such as a flux limiter or a WENO method, and then used as the input for ...

  3. Research & Education Association - Wikipedia

    en.wikipedia.org/wiki/Research_&_Education...

    REA was founded by Max Fogiel in 1959 as an educational publisher, concentrating on problems and solutions, or what's known as test preparation today. The company produced the iconic "Problem Solver" series of comprehensive solution guides. The Problem Solver series eventually encompassed over 30 topics with more than 28,000 problem/solution ...

  4. Roe solver - Wikipedia

    en.wikipedia.org/wiki/Roe_solver

    Roe solver. The Roe approximate Riemann solver, devised by Phil Roe, is an approximate Riemann solver based on the Godunov scheme and involves finding an estimate for the intercell numerical flux or Godunov flux at the interface between two computational cells and , on some discretised space-time computational domain.

  5. Yang–Mills existence and mass gap - Wikipedia

    en.wikipedia.org/wiki/Yang–Mills_existence_and...

    The Yang–Mills existence and mass gap problem is an unsolved problem in mathematical physics and mathematics, and one of the seven Millennium Prize Problems defined by the Clay Mathematics Institute, which has offered a prize of US$1,000,000 for its solution. The problem is phrased as follows: Yang–Mills Existence and Mass Gap.

  6. List of unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/List_of_unsolved_problems...

    List of unsolved problems in physics. The following is a list of notable unsolved problems grouped into broad areas of physics. [1] Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning ...

  7. Euler's three-body problem - Wikipedia

    en.wikipedia.org/wiki/Euler's_three-body_problem

    In physics and astronomy, Euler's three-body problem is to solve for the motion of a particle that is acted upon by the gravitational field of two other point masses that are fixed in space. This problem is exactly solvable, and yields an approximate solution for particles moving in the gravitational fields of prolate and oblate spheroids.

  8. Real analysis - Wikipedia

    en.wikipedia.org/wiki/Real_analysis

    Real analysis is an area of analysis that studies concepts such as sequences and their limits, continuity, differentiation, integration and sequences of functions. By definition, real analysis focuses on the real numbers, often including positive and negative infinity to form the extended real line.

  9. Category:Unsolved problems in physics - Wikipedia

    en.wikipedia.org/wiki/Category:Unsolved_problems...

    Pages in category "Unsolved problems in physics" The following 55 pages are in this category, out of 55 total. This list may not reflect recent changes. ...

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