In the formal language theory of computer science, left recursion is a special case of recursion where a string is recognized as part of a language by...

parsing, left recursion must be eliminated. Direct recursion, be that left or right, is important in context-free grammars, because there recursion is the...

method, see removing left recursion. A simple example for left recursion removal: The following production rule has left recursion on E E -> E '+' T E...

by Frost, Hafiz, and Callaghan, which do accommodate ambiguity and left recursion in polynomial time and which generate polynomial-sized representations...

{\displaystyle {\texttt {'aba3aba'}}} . Left recursion happens when a grammar production refers to itself as its left-most element, either directly or indirectly...

contain left recursion. Any context-free grammar can be transformed into an equivalent grammar that has no left recursion, but removal of left recursion does...

recursion is a method of solving a computational problem where the solution depends on solutions to smaller instances of the same problem. Recursion solves...

contextual comparison is the key to accommodate indirect (or hidden) left-recursion. When performing a successful lookup in a memotable, instead of returning...

language Haskell that solve the long-standing problem of accommodating left recursion, and work as a complete top-down parsing tool in polynomial time and...

implementations of top-down parsing cannot accommodate direct and indirect left-recursion and may require exponential time and space complexity while parsing...

Recursion occurs when the definition of a concept or process depends on a simpler or previous version of itself. Recursion is used in a variety of disciplines...

SourceForge.[citation needed] ANTLR 4 deals with direct left recursion correctly, but not with left recursion in general, i.e., grammar rules x that refer to...

Maynooth, Co. Kildare, Ireland. Moore, Robert C. (2000), "Removing Left Recursion from Context-free Grammars", Proceedings of the 1st North American Chapter...

tail recursive, which is a special case of direct recursion. Tail recursion (or tail-end recursion) is particularly useful, and is often easy to optimize...

grammar::peg Packrat Tcl Mixed All Free, BSD Grako Packrat + Cut + Left Recursion Python, C++ (beta) Separate All Free, BSD IronMeta Packrat C# Mixed...

may or may not be LALR(1). LL grammars cannot have rules containing left recursion. Each LL(k) grammar that is ε-free can be transformed into an equivalent...

and recursion on S gives primitive recursion. If we consider the order relation (N, <), we obtain complete induction, and course-of-values recursion. The...

sequence of nonterminal symbols. Observe that the grammar does not have left recursions. Every context-free grammar can be transformed into an equivalent grammar...

Notice that the function on the left must store in its stack exp number of integers, which will be multiplied when the recursion terminates and the function...

like other programming languages would overflow its stack attempting left recursion. META II uses a $ (zero or more) sequence operator. The expr parsing...

(analysis of algorithms) Mathematical induction Orthogonal polynomials Recursion Recursion (computer science) Time scale calculus Jacobson, Nathan, Basic Algebra...

In mathematics, topological recursion is a recursive definition of invariants of spectral curves. It has applications in enumerative geometry, random...

Levinson recursion or Levinson–Durbin recursion is a procedure in linear algebra to recursively calculate the solution to an equation involving a Toeplitz...

science, corecursion is a type of operation that is dual to recursion. Whereas recursion works analytically, starting on data further from a base case...

The Panjer recursion is an algorithm to compute the probability distribution approximation of a compound random variable S = ∑ i = 1 N X i {\displaystyle...

without reference to the recursive case (here, on its left i.e., in its first argument), then the recursion would stop. This means that while foldr recurses...

composition h ∘ g 1 {\displaystyle h\circ g_{1}} is obtained. Primitive recursion operator ρ {\displaystyle \rho } : Given the k-ary function g ( x 1 ,...

p(input x of size n): if n < some constant k: Solve x directly without recursion else: Create a subproblems of x, each having size n/b Call procedure p...

separated by ⋄ or new-lines, wherein ⍺ denotes the left argument and ⍵ the right, and ∇ denotes recursion (function self-reference). For example, the function...

avoided with alternating the direction of the merge with each level of recursion (except for an initial one-time copy, that can be avoided too). As a simple...