ALL meanings of backtracking
back·track
B b - verb without object backtracking to return over the same course or route. 1
- verb without object backtracking to withdraw from an undertaking, position, etc.; reverse a policy. 1
- noun Technical meaning of backtracking (algorithm) A scheme for solving a series of sub-problems each of which may have multiple possible solutions and where the solution chosen for one sub-problem may affect the possible solutions of later sub-problems. To solve the overall problem, we find a solution to the first sub-problem and then attempt to recursively solve the other sub-problems based on this first solution. If we cannot, or we want all possible solutions, we backtrack and try the next possible solution to the first sub-problem and so on. Backtracking terminates when there are no more solutions to the first sub-problem. This is the algorithm used by logic programming languages such as Prolog to find all possible ways of proving a goal. An optimisation known as "intelligent backtracking" keeps track of the dependencies between sub-problems and only re-solves those which depend on an earlier solution which has changed. Backtracking is one algorithm which can be used to implement nondeterminism. It is effectively a depth-first search of a problem space. 1
- noun backtracking Present participle of backtrack. 1
- noun backtracking The act of one who, or that which, backtracks; a retracing of one's steps. 0