Brian Rushton
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 1d awarded Necromancer Feb 2 awarded Good Answer Jan 6 awarded Necromancer Dec 19 awarded Publicist Dec 19 awarded Booster Dec 19 comment If I draw two cards, what is the probability that either is an ace? Someone edited mine and made it incorrect, and then someone down voted it. I've fixed it. Dec 19 revised If I draw two cards, what is the probability that either is an ace? added 1 character in body Dec 19 awarded Announcer Dec 19 comment Continuity of improper integral with a continuous integrand. Yes! That's the most important part. Dec 19 answered Continuity of improper integral with a continuous integrand. Dec 19 answered If I draw two cards, what is the probability that either is an ace? Dec 13 answered Proving a polynomial is irreducible over a field. Dec 6 awarded Yearling Dec 1 asked Quotients with connected preimages of points Nov 13 accepted What conditions allow a metric on an open ball to be completed to a closed ball? Nov 6 comment Why is it not true that $\int_0^{\pi} \sin(x)\; dx = 0$? @PatrickDaSilva Lol you're right, I'm so embarrassed. I think that this works better: integrate $x^4$ from -1 to 1 with the same substitution. I believe it becomes the integral of $\sqrt{x}/2$ from 1 to 1, which gives an incorrect answer. Thanks for pointing out my silly error! If this one's wrong too, let me know. Nov 5 comment Why is it not true that $\int_0^{\pi} \sin(x)\; dx = 0$? @PatrickDaSilva The substitution $u=x^2$ does not work for the integral of $x^3$ from -1 to 1. Nov 5 answered Why is it not true that $\int_0^{\pi} \sin(x)\; dx = 0$? Nov 5 answered How to Find the value of a trigonometric function if other very complicated trigonometric equation is given? Nov 5 answered Is the addition in modules finite $?$