CS100 Lecture Notes - Lecture 3: Venn Diagram, George Boole, Units Of Paper Quantity
18 Sep 2015
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Boolean algebra (george boole): system to express combinations of sets. Venn diagram: came up with venn diagrams as a way to draw boolean algebra. Search engines use uppercase for writing boolean operators. Using or searches for something with either term. Using and searches for two terms together. Using and not searches for one and only one of two terms. And not is similar in most quires as a dash before the word you do not want included e. g apple -computers. In absence of parentheses and is applied before or. Ranking algorithm: using extra info to help determine the importance of results. Algorithms for this can be illustrated using a spreadsheet. Search engines use more complex approaches to shorten time to perform searches. Google allows multiword searches without the use of boolean terms. Interpret it as if and is between all words but in a more relaxed way. To search for two word phrases use quotation marks.
