Informed search algorithms

Material

Outline

Review: Tree search

Best-first search

Romania with step costs in km

Greedy best-first search

Greedy best-first search example

Greedy best-first search example

Greedy best-first search example

Greedy best-first search example

Properties of greedy best-first search

A^* search

A^* search example

A^* search example

A^* search example

A^* search example

A^* search example

A^* search example

Admissible heuristics

Optimality of A^* (proof)

Optimality of A^* (proof)

Consistent heuristics

Optimality of A^*

Properties of A^*

Admissible heuristics

Admissible heuristics

Dominance

Relaxed problems

Local search algorithms

Example: n-queens

Hill-climbing search

Hill-climbing search

Hill-climbing search: 8-queens problem

Hill-climbing search: 8-queens problem

Simulated annealing search

Properties of simulated annealing search

Genetic algorithms

Genetic algorithms

Genetic algorithms