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 Feb9 comment Integrating absolute complex exponential function @user90593: I have not seen the term before either. Sorry. Feb9 comment System of 4 tedious nonlinear equations: $(a+k)(b+k)(c+k)(d+k) =$ constant for $1 \le k \le 4$ "Today class, we'll be covering how to solve systems of tedious equations, for the people in engineering that love tedious calculations." Feb9 comment Integrating absolute complex exponential function @Mathemagician1234: He could just be having an off day. His other questions lead to believe he's ready. Feb9 answered Integrating absolute complex exponential function Feb9 accepted Trouble showing the addition of the fractional parts are a group. Feb9 comment Trouble showing the addition of the fractional parts are a group. Ok thanks! Yeah, I wrote it backward mostly because it is a comment and I wanted to keep it compact, but still illustrate the crux of my point. I have it better written out in my notebook. Thanks! Feb9 comment Trouble showing the addition of the fractional parts are a group. Ok, I think I get it. As for the second part, I talk about it with Cameron. As for the first part, interpreting the operation as you say I should I get: $([x] + [y]) + [z] = [x] + ([y] + [z])$ Which implies: $[x+y] + [z] = [x] + [y+z]$ Which implies: $[(x+y) + z] = [x + (y + z)]$ Which using additions associative-ness gives: $[x+y+z] = [x+y+z]$ Correct? Feb9 comment Trouble showing the addition of the fractional parts are a group. @CameronWilliams: Ok, I guess that is there to help with the identity element confusion I initially had. That should be simple enough: $x-x' = n$, $y-y' = k$ $x + y - x' - y' = x - x' + y - y' = n + k$. Thanks for clarifying that. Feb9 asked Trouble showing the addition of the fractional parts are a group. Jan31 revised Little o(h) limit about h=0 Added latex. Jan31 suggested approved edit on Little o(h) limit about h=0 Jan31 answered Limit of sequence $n!\left(\frac{e}{n}\right)^n$ Jan15 comment Big list of “guided discovery” books Shouldn't this be a CW? Jan11 revised solving for probability given odds Added latex. Jan11 suggested approved edit on solving for probability given odds Jan9 revised Help Figuring out Period of Trig Function Organized bulleted list and latexed equation. Jan9 suggested approved edit on Help Figuring out Period of Trig Function Dec11 comment What does non-zero integer mean? -1, -2, 1, 3, 5, 7 are all examples of non-zero integers. 0 however is zero and not non-zero... Dec8 awarded Caucus Dec7 awarded Yearling