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2. Recursion - Wikipedia

   en.wikipedia.org/wiki/Recursion

   A recursive step — a set of rules that reduces all successive cases toward the base case. For example, the following is a recursive definition of a person's ancestor. One's ancestor is either: One's parent (base case), or; One's parent's ancestor (recursive step). The Fibonacci sequence is another classic example of recursion: Fib(0) = 0 as ...

3. General recursive function - Wikipedia

   en.wikipedia.org/wiki/General_recursive_function

   General recursive function. In mathematical logic and computer science, a general recursive function, partial recursive function, or μ-recursive function is a partial function from natural numbers to natural numbers that is "computable" in an intuitive sense – as well as in a formal one. If the function is total, it is also called a total ...

4. Recurrence relation - Wikipedia

   en.wikipedia.org/wiki/Recurrence_relation

   Recurrence relation. In mathematics, a recurrence relation is an equation according to which the th term of a sequence of numbers is equal to some combination of the previous terms. Often, only previous terms of the sequence appear in the equation, for a parameter that is independent of ; this number is called the order of the relation.

5. Recursion (computer science) - Wikipedia

   en.wikipedia.org/wiki/Recursion_(computer_science)

   Recursion (computer science) Tree created using the Logo programming language and relying heavily on recursion. Each branch can be seen as a smaller version of a tree. Recursive drawing of a Sierpiński Triangle through turtle graphics. In computer science, recursion is a method of solving a computational problem where the solution depends on ...

6. Well-founded relation - Wikipedia

   en.wikipedia.org/wiki/Well-founded_relation

   As an example, consider the well-founded relation (N, S), where N is the set of all natural numbers, and S is the graph of the successor function x ↦ x+1. Then induction on S is the usual mathematical induction, and recursion on S gives primitive recursion.

7. Levinson recursion - Wikipedia

   en.wikipedia.org/wiki/Levinson_recursion

   Levinson recursion or Levinson–Durbin recursion is a procedure in linear algebra to recursively calculate the solution to an equation involving a Toeplitz matrix. The algorithm runs in Θ (n2) time, which is a strong improvement over Gauss–Jordan elimination, which runs in Θ ( n3 ). The Levinson–Durbin algorithm was proposed first by ...