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  2. Regular singular point - Wikipedia

    en.wikipedia.org/wiki/Regular_singular_point

    This differential equation has regular singular points at 0, 1 and ∞. A solution is the hypergeometric function. References. Arscott, F.M. (1995). "Heun's Equation".

  3. Singular solution - Wikipedia

    en.wikipedia.org/wiki/Singular_solution

    A singular solution y s (x) of an ordinary differential equation is a solution that is singular or one for which the initial value problem (also called the Cauchy problem by some authors) fails to have a unique solution at some point on the solution. The set on which a solution is singular may be as small as a single point or as large as the ...

  4. Frobenius method - Wikipedia

    en.wikipedia.org/wiki/Frobenius_method

    Some solutions of a differential equation having a regular singular point with indicial roots = and .. In mathematics, the method of Frobenius, named after Ferdinand Georg Frobenius, is a way to find an infinite series solution for a linear second-order ordinary differential equation of the form ″ + ′ + = with ′ and ″.

  5. Hypergeometric function - Wikipedia

    en.wikipedia.org/wiki/Hypergeometric_function

    The equation has two linearly independent solutions. At each of the three singular points 0, 1, ∞, there are usually two special solutions of the form x s times a holomorphic function of x, where s is one of the two roots of the indicial equation and x is a local variable vanishing at a regular singular point. This gives 3 × 2 = 6 special ...

  6. Heun function - Wikipedia

    en.wikipedia.org/wiki/Heun_function

    In mathematics, the local Heun function (,;,,,;) (Karl L. W. Heun 1889) is the solution of Heun's differential equation that is holomorphic and 1 at the singular point z = 0. The local Heun function is called a Heun function , denoted Hf , if it is also regular at z = 1, and is called a Heun polynomial , denoted Hp , if it is regular at all ...

  7. Frobenius solution to the hypergeometric equation - Wikipedia

    en.wikipedia.org/wiki/Frobenius_solution_to_the...

    We shall prove that this equation has three singularities, namely at x = 0, x = 1 and around x = infinity. However, as these will turn out to be regular singular points, we will be able to assume a solution on the form of a series. Since this is a second-order differential equation, we must have two linearly independent solutions.

  8. Riemann's differential equation - Wikipedia

    en.wikipedia.org/wiki/Riemann's_differential...

    In mathematics, Riemann's differential equation, named after Bernhard Riemann, is a generalization of the hypergeometric differential equation, allowing the regular singular points to occur anywhere on the Riemann sphere, rather than merely at 0, 1, and . The equation is also known as the Papperitz equation. [1]

  9. Confluent hypergeometric function - Wikipedia

    en.wikipedia.org/wiki/Confluent_hypergeometric...

    with a regular singular point at z = 0 and an irregular singular point at z = ∞. It has two (usually) linearly independent solutions M ( a , b , z ) and U ( a , b , z ) . Kummer's function of the first kind M is a generalized hypergeometric series introduced in ( Kummer 1837 ), given by: