## Principles of Artificial IntelligenceA classic introduction to artificial intelligence intended to bridge the gap between theory and practice, Principles of Artificial Intelligence describes fundamental AI ideas that underlie applications such as natural language processing, automatic programming, robotics, machine vision, automatic theorem proving, and intelligent data retrieval. Rather than focusing on the subject matter of the applications, the book is organized around general computational concepts involving the kinds of data structures used, the types of operations performed on the data structures, and the properties of the control strategies used. Principles of Artificial Intelligenceevolved from the author's courses and seminars at Stanford University and University of Massachusetts, Amherst, and is suitable for text use in a senior or graduate AI course, or for individual study. |

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... graph - searching algorithms . The procedure generates an explicit graph , G , called the

... graph - searching algorithms . The procedure generates an explicit graph , G , called the

**search graph**and a subset , T , of G called the search tree . Each node in G is also in T. The search tree is defined by the pointers that are set ...Page 66

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**graph**is the**search**tree throughout the execution of the algorithm , and there is no need to change parents of the nodes in T. If the implicit ...**search**tree shown in Figure 2.4 . The 66**SEARCH**STRATEGIES FOR AI PRODUCTION SYSTEMS.Page 67

Nils J. Nilsson. graph and search tree shown in Figure 2.4 . The dark arrows along certain arcs in this

Nils J. Nilsson. graph and search tree shown in Figure 2.4 . The dark arrows along certain arcs in this

**search graph**are the pointers that define parents of nodes in the search tree . The ...**search graph**and 67 GRAPH SEARCH STRATEGIES.### Contents

PROLOGUE | 1 |

PRODUCTION SYSTEMS AND AI | 17 |

SEARCH STRATEGIES FOR | 53 |

Copyright | |

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8-puzzle achieve actions Adders AI production algorithm AND/OR graph applied Artificial Intelligence atomic formula backed-up value backtracking backward block breadth-first breadth-first search called chapter clause form CLEAR(C component CONT(Y,A contains control regime control strategy cost Deleters delineation depth-first search described discussed disjunction domain element-of evaluation function example existentially quantified F-rule formula frame problem global database goal expression goal node goal stack goal wff graph-search HANDEMPTY heuristic HOLDING(A implication initial state description knowledge literal nodes logic monotone restriction natural language processing negation node labeled ONTABLE(A optimal path pickup(A precondition predicate calculus problem-solving procedure production system proof prove recursive regress represent representation resolution refutation result robot problem rule applications search graph search tree selected semantic network sequence shown in Figure Skolem function solution graph solve stack(A STRIPS structure subgoal substitutions successors Suppose symbols termination condition theorem theorem-proving tip nodes universally quantified unstack(C,A variables WORKS-IN