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  1. W

    Random Thoughts part 6

    Guns n'Roses changing it's name to attract the Math, Logician crowd: Guns if and only if Roses.
  2. W

    Random Thoughts part 6

    In France, Marseille 1, nothing Tolouse.
  3. W

    Random Thoughts part 6

    I'm still unable to drink fluids to take care of a cold. Liquids, yes. Gases, not quite yet.
  4. W

    Collection of Lame Jokes

    Same with me pointing out in Bruno Mars' video " It will Rain", that morphine is used for physical, not emotional, pain. No wonder I'm writing this comment from my home on Friday night , while all others are out in bats, clubs.
  5. W

    Collection of Lame Jokes

    Now no one will be able to steal the wall:
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    Collection of Lame Jokes

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    Collection of Lame Jokes

    Recent causes
  8. W

    Collection of Lame Jokes

    High-level discussion on the web, as usual
  9. W

    Collection of Lame Jokes

  10. W

    Complex numbers confusion (how they got this expression in orange to become -1)

    Well, part of the issue is that exp(z) plays a role when dealing with Complexes, e.g., Polar representation, but it's not 1-1, and as such has no global inverse log. This requires you to patch together local inverses. A mess. Edit: Here the square root too, may involve arguments, branches, and...
  11. W

    Collection of Lame Jokes

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    Collection of Lame Jokes

  13. W

    V Space With Norm $||*||$ - Fourier Series

    $$ _always_ works. you just need enough of it ;).
  14. W

    B Dividing by infinity, exactly, finally!

    Sure, https://en.wikipedia.org/wiki/Compactness_theorem Through the concept of Elementary Equivalence , aka, the Transfer Principle, 1st -order properties are preserved "upwardly", from lower to higher cardinality, between models of different cardinality. Edit: Is that what you were asking?
  15. W

    B Dividing by infinity, exactly, finally!

    You only need to check through ## \aleph_0## models of the Reals , per Lowenheim -Skolem. Outside of the standard Reals, you lose " standard " metrizability, since metric are Real-valued.
  16. W

    B Dividing by infinity, exactly, finally!

    Figure it out and you'll get a Figure one out and go collect your Fields/Abel medal.
  17. W

    Collection of Lame Jokes

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    Collection of Lame Jokes

  19. W

    Collection of Lame Jokes

    You aint nothing but a Groundhog.
  20. W

    Complex numbers confusion (how they got this expression in orange to become -1)

    Yes, kind of a nightmare dealing with the branching alone.
  21. W

    Complex numbers confusion (how they got this expression in orange to become -1)

    Or, to be pedantic, use that the Complexes can be seen as a field extension by ## x^2+ 1 ##. Then, in the extension ## \mathbb R[x]/(x^2 +1) ; x^2 +1 =0 ## You designate this new element by ##i ##..
  22. W

    Random Thoughts part 6

    Every tab everything working except YouTube. I was searching for SysInternals. Which I never had??
  23. W

    Collection of Lame Jokes

    If at first you don't succeed, don't try skydiving.
  24. W

    Proving eigenvalues of a 2 x 2 square matrix

    Eigenvalues ##\lambda## for a matrix ##A##are defined to satisfy ##Det(A-\lambda I)=0##. This comes from ##Ax=\lambda x ##, so that ##(A-\lambda I )x=0 ##.
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    Collection of Lame Jokes

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    Collection of Lame Jokes

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    Collection of Lame Jokes

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    Collection of Lame Jokes

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    Collection of Lame Jokes

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    Collection of Lame Jokes

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    Collection of Lame Jokes

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    Collection of Lame Jokes

  33. W

    Baffled by old school exam

    But it was an _open_ exam. ;).
  34. W

    I Why isn't this a Lie group?

    One result I remember is that given ##G## a Lie Group; here ## \mathbb T^2##, a subset is a Lie Group if it's both a subgroup and topologically closed in ##G##.
  35. W

    B Are there two kinds of inverse with respect to closure?

    Nor would it be onto, if we consider ##\mathbb N =\{1,2,..\} ##, as nothing would hit ##1##.
  36. W

    Baffled by old school exam

    Worse comes to worse, time is running out on the exam, cube both sides. Only one term will remain to a non-unity power p/q. Leave it alone in one side and raise both sides to the qth power. Hardly elegant, but at least you'll get some credit. Edit: In this exercise, you first cube both sides...
  37. W

    Collection of Lame Jokes

    Had to correct my friend . I told him to put a potato in his bathing suit at the beach to help him impress women. But In the front, not in the back, as he did last time.
  38. W

    Collection of Lame Jokes

    Winner gets a Lapp dance.
  39. W

    Is it possible to find a number x such that 5 < x < 1?

    You mean as in using Order Statistics? Say horse number five finished the race before horse number 1( of course, numbers were given before the race)?
  40. W

    Collection of Lame Jokes

    That's music to Meir.
  41. W

    Collection of Lame Jokes

    Weird exchange: I have something in my ear Well, it can't be Golda, she's been dead for a while.
  42. W

    Is it possible to find a number x such that 5 < x < 1?

    So, the expression 5 < 1 by itself does not provide enough information to determine what this '<' means, nor how it works by itself.
  43. W

    Is it possible to find a number x such that 5 < x < 1?

    Still, to keep some standards, we need to deal with Mathematical issues: What requirements must an ordering satisfy?
  44. W

    Is it possible to find a number x such that 5 < x < 1?

    This works, but needs rescaling to fit the OP: Assume there are numbers S between 0 and 1. Then since the set is bounded, it has a least upper bound L, so that: 0<L<1 Now multiply thtough by L: 0< L^2<L Then L^2 is a bound lower than L. Contradiction.
  45. W

    Random Thoughts part 6

    Not too confident about an organization called the " Feil" organization.
  46. W

    Collection of Lame Jokes

    A club sandwich?
  47. W

    Collection of Lame Jokes

    I think Turkey in Turkish is 'Gindi'
  48. W

    Collection of Lame Jokes

    Abraham includes Pastrami
  49. W

    Collection of Lame Jokes

    Geography, religion and meats: Turkey: Ottoman Empire, Ham: Muslims Bacon: Britain ( Roger). Rotisserie: 15:3.
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