Date: 04/07/97 at 22:22:36 From: Bob Howell Subject: Math Symbols I do not know what many of the math symbols in my book mean (like the upside down A, backward E, etc., etc.) Where can I find definitions of these symbols? Thanks for your help. Bob Howell
Date: 04/08/97 at 21:35:35 From: Doctor Keith Subject: Re: Math Symbols Hi, Most math books put an appendix with notation or mention it in the preface, to avoid this problem. Here are a couple of basics: 1. upside down A means "for all" 2. backward E means "there exists" 3. epsilon (looks like c with horizontal line in middle) means "an element of" or "in" of "belongs to" 4. backwards epsilon means "such that" 5. three dots triangle, point up means "therefore" or "thus" 6. three dots triangle, point down means "because" or "due to" These basic four cover most of the cases that you will find but of course many others exist. You can always go to a library and check out a book by another author, who includes the symbol definitions. There's also a link to the page that compiles information about the first uses of some math symbols at the bottom of our Dr. Math FAQ: http://mathforum.org/dr.math/faq/ -Doctor Keith, The Math Forum Check out our web site! http://mathforum.org/dr.math/
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