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  • Evgeny.Makarov's Avatar
    Yesterday, 17:15
    Since nobody gave an answer, I am posting a solution. I will omit $\cap$ and write intersection as multiplication. I will also write $\sqcup$ for...
    1 replies | 94 view(s)
  • topsquark's Avatar
    Yesterday, 14:32
    topsquark replied to a thread Jokes in Chat Room
    Of course I remember it. I didn't say you didn't have a punch line, I just wanted a better one for my efforts. However if you are looking for...
    209 replies | 31565 view(s)
  • Evgeny.Makarov's Avatar
    Yesterday, 12:10
    Evgeny.Makarov replied to a thread Jokes in Chat Room
    209 replies | 31565 view(s)
  • Ackbach's Avatar
    Yesterday, 12:00
    Ackbach replied to a thread (Possibly) Big News in Chat Room
    Haven't heard any update on the status of his proof, other than, apparently, Atiyah passed away on January 11.
    2 replies | 322 view(s)
  • Wilmer's Avatar
    Yesterday, 09:45
    Wilmer replied to a thread Jokes in Chat Room
    Dan, you saying you're not familiar with this popular commercial by Bell Telephone: LET YOUR FINGERS DO THE WALKING THROUGH THE YELLOW PAGES ??? ...
    209 replies | 31565 view(s)
  • topsquark's Avatar
    Yesterday, 00:54
    topsquark replied to a thread Jokes in Chat Room
    vBulleting has a feature where you can "like" someone's post. Is there an option to "dislike" a post? C'mon Wilmer. If you are going to write a...
    209 replies | 31565 view(s)
  • Wilmer's Avatar
    January 15th, 2019, 21:17
    Wilmer replied to a thread Jokes in Chat Room
    This one is similar: YELLOW FINGERS ============== Explanatory pause; you're wrong:...
    209 replies | 31565 view(s)
  • Wilmer's Avatar
    January 15th, 2019, 19:51
    Wilmer replied to a thread Jokes in Chat Room
    I first heard it as a quite short joke... wrote the story "expanding" it!!
    209 replies | 31565 view(s)
  • Ackbach's Avatar
    January 15th, 2019, 17:35
    Or another approach: \begin{align*} \dot{y}&=y(1-y) \\ \int\frac{dy}{y(1-y)}&=\int dt \\ \int\frac{dy}{y}-\int\frac{dy}{y-1}&=t+C \\...
    3 replies | 77 view(s)
  • topsquark's Avatar
    January 15th, 2019, 17:30
    To get you started: This is a Bernoulli differential equation. You can see the solution method here. -Dan
    3 replies | 77 view(s)
  • Evgeny.Makarov's Avatar
    January 15th, 2019, 17:29
    Evgeny.Makarov replied to a thread Jokes in Chat Room
    I heard the variant of this joke where a haunted casket started chasing a woman in the street, who managed to reach her home, ran into the bathroom...
    209 replies | 31565 view(s)
  • Wilmer's Avatar
    January 15th, 2019, 17:08
    Wilmer replied to a thread Jokes in Chat Room
    Is "Hmm" a question?
    209 replies | 31565 view(s)
  • Evgeny.Makarov's Avatar
    January 15th, 2019, 16:54
    Evgeny.Makarov replied to a thread Jokes in Chat Room
    Hmm. This reminds me of The Simpsons episode "The Italian Bob" (season 17, episode 8). Marge says, "It's obvious why (Sideshow) Bob is a vaunted...
    209 replies | 31565 view(s)
  • Wilmer's Avatar
    January 15th, 2019, 10:33
    Wilmer replied to a thread Jokes in Chat Room
    STOP THAT COUGHIN' ================= Mr. Cohen duly signed an affidavit stating that this story is true. The number of that affidavit is 89-127....
    209 replies | 31565 view(s)
  • anemone's Avatar
    January 15th, 2019, 09:56
    Here is this week's POTW: ----- This week POTW is a follow-up question from last week problem Prove that 2 is persistent. -----
    0 replies | 44 view(s)
  • anemone's Avatar
    January 15th, 2019, 09:47
    Congratulations to Olinguito for his correct solution, which you can find below: Let $T$ be a persistent number. Choose real numbers...
    1 replies | 146 view(s)
  • Wilmer's Avatar
    January 14th, 2019, 17:37
    Wilmer replied to a thread Working out Percentage in Other Topics
    ...or calculate the average balance for the year; multiply result by .021 Example: if av.bal. = 1200, then 1200*.021 = 25.20 Enough for a 12pack...
    2 replies | 58 view(s)
  • GJA's Avatar
    January 14th, 2019, 03:23
    Nicely done. Yes, $W$ is a linear subspace of $\mathbb{R}^{3}.$ To analyze $V$, note that each of the terms (thinking of $(x-y)$ as one term) is...
    5 replies | 121 view(s)
  • GJA's Avatar
    January 13th, 2019, 21:07
    Hi Yankel, Your analysis is off to a good start when you noted that $0 = (0,0,0)$ is a member of both sets. It is helpful to look at the equations...
    5 replies | 121 view(s)
  • greg1313's Avatar
    January 13th, 2019, 20:49
    x + 9 = -2 so x = -11.
    3 replies | 100 view(s)
  • topsquark's Avatar
    January 13th, 2019, 19:46
    topsquark replied to a thread Jokes in Chat Room
    No, our relationship isn't going anywhere. I have to leave you, my love. Just let me go so I can have some \partial S \cup S. -Dan
    209 replies | 31565 view(s)
  • Evgeny.Makarov's Avatar
    January 13th, 2019, 17:16
    Evgeny.Makarov replied to a thread Jokes in Chat Room
    Honey, \forall N>0\;\exists\delta>0\;|i-u|<\delta\implies\heartsuit(i)>N. Will you marry me?
    209 replies | 31565 view(s)
  • topsquark's Avatar
    January 11th, 2019, 23:57
    Just a quick FYI: The first equation may be written as y = x^2 - 9. It seems obvious but not including the ^ can potentially cause confusion. ...
    3 replies | 112 view(s)
  • MarkFL's Avatar
    January 11th, 2019, 23:13
    Hello, and welcome to MHB! (Wave) For future reference, please limit your threads to a maximum of two questions posted. :) Let's look at the...
    3 replies | 112 view(s)
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"It's not necessary for you to pick pen and paper to solve a problem, the most intriguing questions are those that you're thinking of most of the time anyway" Zaid Alyafey .


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