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 Apr 27 suggested rejected edit on Where does the gap come from? Apr 7 revised Understanding Euclid's proof that the number of primes is infinite. Grammar & Mathjax. Apr 7 suggested approved edit on Understanding Euclid's proof that the number of primes is infinite. Apr 3 comment What does the symbol |_ mean? It would be good to cite the work in general, @hardmath. Mar 7 comment Show that (p ∧ q) → (p ∨ q) is a tautology? What does "T.T." in the middle of your question mean? Feb 25 revised Is the function $|x|$ in $W^{1,p}$? Tidied grammar. Feb 25 suggested approved edit on Is the function $|x|$ in $W^{1,p}$? Feb 20 revised Can't find the flaw in the reasoning for this proof by induction? Added missing apostrophe. Formatted quote as blockquote for easier reading. Feb 20 suggested approved edit on Can't find the flaw in the reasoning for this proof by induction? Nov 12 revised What software can draw pictures like this? Tidied grammar. Added alt text (could be improved). Nov 12 suggested approved edit on What software can draw pictures like this? Oct 14 revised Laws of logic Assertion/Reason format Took author's name out of italics; corrected book title (Application: singular). Improved link text ("click here"). And glaze over -> gloss over. (This usage of /glaze over/ is new to me; I found it supported in Wiktionary, but not in other dictionaries.) Oct 14 suggested approved edit on Laws of logic Assertion/Reason format Sep 7 revised Fibonacci infinite sum resulting in $\pi$ Tidied grammar (spaces before punctuation; verb agreement; missing question mark). Added headers. Sep 7 suggested approved edit on Fibonacci infinite sum resulting in $\pi$ Sep 1 revised Perpendicular bisector Tidied grammar. Improved image alt text. Sep 1 suggested approved edit on Perpendicular bisector Aug 28 comment Statistics: Why doesn't the probability of an accurate medical test equal the probability of you having disease? Back in the real world, most medical tests don't have a simple "right 90% of the time" state: initial screening tests are chosen to have a very low false negative rate, for example, while they may have a higher false positive rate. This preserves resources, as the more expensive and precise tests are used only on those who were found positive in the initial screening. Furthermore, you don't care about the incidence of the condition in the population at large: you care about the incidence in the population being tested. Aug 14 suggested rejected edit on Can a logarithm have a function as a base? Aug 8 revised What does an arrow under a sigma mean? Transcribed image for better accessibility and quicker loading times. Incorporated information from comments.