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 1d comment Optimal bandwidth for histogram density estimator First, using all capital letters in your heading is considered shouting - thus rude. Second you might rephrase your question as a request rather than a command. Apr13 asked Reference Request for Complex Analysis (with some specificity regarding Ahlfors and Cartan) Apr10 comment Mathematics books that tell you what is really happening? In that you mentioned V. Arnold, coincidentally, I was looking at Prof. Giventhal's (Berkeley) home page for a CA course he is giving and saw this tribute to his teacher which I thought you would like to see: math.berkeley.edu/~giventh/arnold_en.pdf Apr10 answered Mathematics books that tell you what is really happening? Apr9 comment Big-$O$ for $\frac{1}{1-x}$ Thanks for your graciousness Apr9 accepted Big-$O$ for $\frac{1}{1-x}$ Apr9 comment Big-$O$ for $\frac{1}{1-x}$ Thanks, you are right, I had noticed my mistake in the consistency of the exponents; but should have fixed it as you suggest rather than as I did. Also please forgive me, while you answer is certainly excellent, the other responder came first, so I feel I should accept his answer. This aspect is always uncomfortable. With regards, Apr9 revised Big-$O$ for $\frac{1}{1-x}$ added 8 characters in body Apr9 comment Big-$O$ for $\frac{1}{1-x}$ Thanks - I'll give it a try. Regards, Apr9 asked Big-$O$ for $\frac{1}{1-x}$ Apr6 awarded Nice Question Apr2 comment Why are there four solutions to $x^2-2x-8=0$ in $\mathbb{R}$? Or am I wrong? Well, crash certainly improved things, yet you might further consider changing "we" to "I" Apr2 comment Why are there four solutions to $x^2-2x-8=0$ in $\mathbb{R}$? Or am I wrong? Typically, for example on an exam, when you get what you think is a solution to a quadratic equation, it is easy to check your result by substitution. Had you done that and had that realization, you might have phrased your question a bit more responsibly - such as "Flaw in my reasoning" rather than as you did. Apr1 comment Introductory Group theory textbook @RespawnedFluff Thanks for your opinion. Yes, it is a pain to have to flip around. Unfortunately I find a lot of kindle math books have lots of typos due to notational issues. Sometimes I have spent too much time trying to untangle them, and a look at a print edition comes to the rescue. However, I think we would both agree that the prices of math book are obscene, and "Artin" in particular. Regards, Mar26 comment 4D Geometry Book You might enjoy looking at the March 17th post on this blog by John Baez johncarlosbaez.wordpress.com Mar25 revised What are the irreducible curves on the blow up of $\mathbb{P}^{2}$? edited title Mar18 comment Construct algebraic closure of $\mathbb{Q}$ Dear Bruno - On top of this being a great answer, what a cool avatar. My avatar wants to meet yours. Best regards, Mar16 comment Book recommendation to prepare for geometry in the International Mathematical Olympiad Great - Thanks. Best regards, Mar16 comment Book recommendation to prepare for geometry in the International Mathematical Olympiad Too late to mention the link. But love the Wallace Stevens and, if I may ask, what is that cool avatar? Thanks Mar9 comment Books like Silverman&Tate “Rational Points on Elliptic Curves” @GregoryGrant Any topic, including elliptic curves would be much appreciated. Thanks