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An Unreported Mistake in "Advanced Calculus"

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After setting up Octopress for several weeks, I can finally begin to write some math. The errors of FitzPatrick’s Advanced Calculus can be found at Walla Walla University.

Two weeks ago, I found a mistake in the book that wasn’t in the error list. In p. 430, ln. -3, the ‘<’ sign should actually be a ‘≤’, since it’s given that .

P.S. I need to escape the \ inside an inline equation so as to get the norm displayed. A blog post contains a macro for the norm. Another one claims that the code surrounded with double dollar sign (i.e. $$) will be interpreted as an inline equation, but not a displayed one. For example, $$\sum_{i=1}^{n} i = n (n + 1) / 2$$ will give you .