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 Feb27 comment Apply Cauchy-Schwartz to vector? Sorry this is a better link: en.wikipedia.org/wiki/Cauchy%E2%80%93Schwarz_inequality#Rn Feb27 comment Apply Cauchy-Schwartz to vector? They have both. Under special cases they have $\mathbb{R}^n$ Feb27 comment Apply Cauchy-Schwartz to vector? They have the case for $\mathbb{R}^n$ on wikipedia: en.wikipedia.org/wiki/Cauchy%E2%80%93Schwarz_inequality With the proof. Feb23 comment Put this word problem into math terms: A man goes to a stream… Specifically the part about 2. Die Hard Feb23 comment Put this word problem into math terms: A man goes to a stream… You may want to look at this: ocw.mit.edu/courses/electrical-engineering-and-computer-science/… Feb18 comment Where does the function $f(x) =\Big[\frac{1}{2}*x\Big]$ contain discontinuities, left or right continuous? @amWhy: Sorry, recently went of a released exam that used awkward notation. Used brackets as fractional part. Feb18 revised Where does the function $f(x) =\Big[\frac{1}{2}*x\Big]$ contain discontinuities, left or right continuous? deleted 98 characters in body Feb18 revised Does my proof about convergent sequences look ok? Added latex. Feb18 answered Where does the function $f(x) =\Big[\frac{1}{2}*x\Big]$ contain discontinuities, left or right continuous? Feb18 suggested approved edit on Does my proof about convergent sequences look ok? Feb17 revised How do I put this differential equation into mathcad 11 Added equation. Feb17 suggested approved edit on How do I put this differential equation into mathcad 11 Feb17 comment Proving the sines and cosines of the special angles for the unit circle Because adj and opp are both <1 in those cases Feb17 comment When will point with velocity hit line? Constant velocity? Feb13 accepted Prove $\mathbb{Z} \times \mathbb{Z} / \left\langle (6,9)\right\rangle$ has an element of order 3 Feb13 reviewed Approve Prove $\mathbb{Z} \times \mathbb{Z} / \left\langle (6,9)\right\rangle$ has an element of order 3 Feb13 comment Prove $\mathbb{Z} \times \mathbb{Z} / \left\langle (6,9)\right\rangle$ has an element of order 3 Oh, I was thinking the quotient of two sets, so we would remove them completely, I guess group notation is slightly different then. Thank you for also clarifying there is no multiplication. :) Feb13 asked Prove $\mathbb{Z} \times \mathbb{Z} / \left\langle (6,9)\right\rangle$ has an element of order 3 Feb11 revised Integration of a differential that is a function of itself. added latex for ease of reading. Feb11 suggested approved edit on Integration of a differential that is a function of itself.