# lec01 - 6.006 Introduction to Algorithms Lecture 1 Document...

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6.006 Introduction to Algorithms Lecture 1: Document Distance Prof. Erik Demaine

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Your Professors Prof. Erik Demaine Prof. Piotr Indyk Prof. Manolis Kellis
Your TAs Kevin Kelley Joseph Laurendi Tianren Qi Nicholas Zehender David Wen

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Today Class overview What’s a (good) algorithm? Topics Document Distance Vector space model Algorithms Python profiling & gotchas
What’s an Algorithm? Mathematical abstraction of computer program Well‐specified method for solving a computational problem Typically, a finite sequence of operations Description might be structured English, pseudocode, or real code Key: no ambiguity http://en.wikipedia.org/wiki/File:Euclid_flowchart_1.png

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al Khw ā rizm ī (c. 780–850) “al‐kha‐raz‐mi” http://en.wikipedia.org/wiki/File:Abu_Abdullah_Muhammad_bin_Musa_al‐Khwarizmi_edit.png http://en.wikipedia.org/wiki/Al‐Khwarizmi
al Khw ā rizm ī (c. 780–850) “al‐kha‐raz‐mi” Father of algebra The Compendious Book on Calculation by Completion and Balancing (c. 830) equations: some of the first algorithms http://en.wikipedia.org/wiki/File:Image‐Al‐Kit%C4%81b_al‐ mu%E1%B8%ABta%E1%B9%A3ar_f%C4%AB_%E1%B8%A5is%C4%81b_al‐ %C4%9Fabr_wa‐l‐muq%C4%81bala.jpg http://en.wikipedia.org/wiki/Al‐Khwarizmi

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Efficient Algorithms Want an algorithm that’s Correct Fast Small space General Simple Clever
Efficient Algorithms Mainly interested in scalability as problem size grows

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Why Efficient Algorithms? Save wait time, storage needs, energy
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## This note was uploaded on 11/11/2011 for the course MATH 180 taught by Professor Byrns during the Spring '11 term at Montgomery College.

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lec01 - 6.006 Introduction to Algorithms Lecture 1 Document...

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