6.851: Advanced Data Structures (Spring'12)

Prof. Erik Demaine     TAs: Tom Morgan, Justin Zhang

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[+] Succinct: compact suffix arrays and trees Scribe Notes [src]
This lecture continues our theme of succinct data structures. Building on our expertise with succinct tries, we'll continue on to the practical problem of indexing text with suffix arrays/trees, where several compact and some succinct results are known, with reasonably small (though suboptimal) slowdowns in query time. We'll cover a simple version (not the best) of the historically first such result, which is a compact suffix array that incurs a logε overhead in queries. Then we'll see how to turn any suffix array into a suffix tree with very little (succinct) additional space overhead. We'll get to use our friends (rank, select, balanced parentheses) from last lecture.

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Lecture notes, page 1/7[previous page][next page][PDF]

Lecture notes, page 1/7[previous page][next page][PDF]

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