I'm reading Vinberg's "a course in algebra" to have a basic understanding. I wonder if there is an errata for the book?
For example, Example 1.52 on page 23 talks about "$x^2+x+1=0$" , however I suspect it shall be "$x^2+x-1=0$" .
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$\begingroup$ Yes, it's definitely a typo, your suspicion is correct. $\endgroup$– b00n heTMay 14, 2014 at 14:18
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