Lecture 19 sma star algorithm

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This document presents the Simplified Memory Bound A* algorithm, an extension of A* that uses available memory to store paths. It stores the shortest path in memory if possible, otherwise the best path that fits. With sufficient memory, it has the same speed as A*, but will return the best path that fits if full memory is not available.

Engineering

Simplified Memory Bound A*
Algorithm
(Extension of A*)
Lecture-19
Hema Kashyap
7 September 2015 1

SMA*-Properties
• Complete: If available memory allows to store
the shortest path.
• Optimal: If available memory allows to store the
best path.
– Otherwise: returns the best path that fits in
memory.
• Memory: Uses whatever memory available.
• Speed: If enough memory to store entire tree:
same as A*
7 September 2015 33

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