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Everything about Holonomic function

Type of functions, in mathematical analysis

In mathematics, and more specifically in analysis, a holonomic function is a smooth function of several variables that is a solution of a system of linear homogeneous differential equations with polynomial coefficients and satisfies a suitable dimension condition in terms of D-modules theory. More precisely, a holonomic function is an element of a holonomic module of smooth functions. Holonomic functions can also be described as differentiably finite functions, also known as D-finite functions. When a power series in the variables is the Taylor expansion of a holonomic function, the sequence of its coefficients, in one or several indices, is also called holonomic. Holonomic sequences are also called P-recursive sequences: they are defined recursively by multivariate recurrences satisfied by the whole sequence and by suitable specializations of it. The situation simplifies in the univariate case: any univariate sequence that satisfies a linear homogeneous recurrence relation with polynomial coefficients, or equivalently a linear homogeneous difference equation with polynomial coefficients, is holonomic. Wikipedia →

🧭 Start here: a 6-step reading path

  1. Read the overview: Holonomic functionA 5-minute orientation
  2. Skim a recent paper: Tracking control of chained non‐holonomic systems with asymmetric function constraints and external disturbanceInfluential work since 2022
  3. Pick up a classic book: Gröbner deformations of hypergeometric differential equationsThe most-reprinted book on the subject
  4. Read the landmark paper: B-functions and holonomic systemsCited 225 times
  5. Go sideways: Linear differential equationA closely related topic
  6. Go sideways: Recurrence relationA closely related topic

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