• Re: how (quantities and units, implicits and explicits, intensional and

    From Jim Burns@21:1/5 to Ross Finlayson on Wed Jun 19 12:43:00 2024
    On 6/18/2024 10:34 PM, Ross Finlayson wrote:
    On 06/18/2024 05:45 PM, Jim Burns wrote:

    So, I would say
    5 elephants ≠ 5 cats

    But context matters.
    I would also say
    5 mammals = 5 mammals

    I will courageously assert: it depends.

    "If 1/oo = 0, what if you add oo/oo = 1?"

    If 1/∞ = 0 then
    not all x/y = z imply x = z⋅y or
    not all 0⋅x = 0 or
    not 1 ≠ 0

    I would say context matters.

    Here, I see the context can't be the real numbers.
    Other than that, what can we say?

    Not a shrug.
    I'm really asking you, Ross: _What can we say_ ?
    You've extended the reals. _How_ ?

    Consider ∞
    as the point at the top of the Riemann sphere,
    plugging the hole left when
    the complex plane rolls up and covers
    the unit sphere sitting on top of 0+0i

    We have 1/∞ = 0
    We don't have ∞/∞ or 0/0 at all.
    So, not that, either.
    So, then, what?

    https://en.wikipedia.org/wiki/Riemann_sphere

    What you got there is
    extensionality and intensionality,
    that extensionally X mammals is X mammals,
    while, intensionally, it depends:
    on the individuals.

    I really don't know what you're saying.

    For 5 individual elephants and 5 individual cats,
    5 mammals = 5 mammals.

    Not the same mammals.
    In many (not all) contexts,
    context matters to the point of making
    | 5 mammals = 5 mammals
    confusing, pointless, or even dishonest.

    ⎛ One horse won this year's Kentucky Derby.
    ⎜ One horse didn't win it.
    ⎜ One horse = one horse?
    ⎝ Opinions differ.

    Nice thing about language:
    it's built into the words.

    Words or something else.
    https://en.wikipedia.org/wiki/American_Sign_Language

    "In-di-vidual."

    https://en.wikipedia.org/wiki/Individual
    | An individual is
    | that which exists as a distinct entity.

    Nice thing about the English language:
    There are separate grammatical categories for
    what exists as distinct entities (count nouns)
    and what doesn't (mass nouns).

    Is the continuum a count noun or a mass noun?
    (Not the best question. English ≠ math)

    It seems to me that it crosses back and forth.
    Points are definitely a count noun.
    But the idea of a continuum seems
    inescapably not.individuals.

    Perhaps that count/mass dimorphism is
    why the occasional poster rejects uncountability.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Jim Burns@21:1/5 to Ross Finlayson on Thu Jun 20 12:47:36 2024
    On 6/19/2024 8:32 PM, Ross Finlayson wrote:
    On 06/19/2024 01:29 PM, Ross Finlayson wrote:
    On 06/19/2024 09:43 AM, Jim Burns wrote:

    https://en.wikipedia.org/wiki/Individual
    | An individual is
    | that which exists as a distinct entity.

    Nice thing about the English language:
    There are separate grammatical categories for
    what exists as distinct entities (count nouns)
    and what doesn't (mass nouns).

    Is the continuum a count noun or a mass noun?
    (Not the best question. English ≠ math)

    It seems to me that it crosses back and forth.
    Points are definitely a count noun.
    But the idea of a continuum seems
    inescapably not.individuals.

    Perhaps that count/mass dimorphism is
    why the occasional poster rejects uncountability.

    Well good sir,
    mostly it's that firstly there's that
    the "infinite limit" must concede that
    it's actually infinite
    and that
    the limit is not only "close enough"
    yet actually that
    it achieves the limit, the sum,
    because deduction arrives at that
    otherwise it's no more than half,
    and, not close enough.

    That reason confuses 'infinite' with 'humongous'.

    If I recall correctly,
    I have pointed this confusion out to you, and
    your riposte has been (framed non.technically)
    that, yes, that's 'infinite': 'humongous'.

    So, I'm wondering why you have clung so tightly to
    this specific confusion.

    Then there's
    for division and divisibility,
    the "infinite-divisibility" and
    for this sort of "actually complete infinite limits"
    the "infinitely-divided".

    The infinitely.divided means the continuum limit.
    The continuum limit means lattice.spacing → 0

    The continuum is such that, for each split,
    the foresplit holds a last point or
    the hindsplit holds a first point.

    The continuum limit is not the continuum.
    in part because
    the continuum limit is countable and
    the continuum is uncountable.

    Then it's pretty much exactly
    most people's usual notion of that
    an infinitude of integers,
    regular both in increment and in dispersion,
    so equi-distributed and equi-partitioning
    the space of integers, is
    the same kind of thing when shrunk to [0,1],
    the space of [0,1]
    as by the same members, that it fulfills
    extent, density, completeness, measure,
    thusly that
    the Intermediate Value Theorem holds,
    then thusly
    any relevant standard analysis about calculus
    holds, or has forms that hold.

    The humongous shrunk to [0,1] stays
    equi-distributed and equi-partitioning
    However, the infinite is different, and
    an analogous claim for the infinite is inconsistent.

    No,
    the intermediate value theorem does not hold
    for the → 0 limit.lattice.
    AKA the continuum limit.

    What it is is that at one point
    I wrote non-standard field axioms for [-1, 1],
    so, now the usual
    "the complete ordered field being unique
    up to isomorphism"
    is a distinctness result
    instead of a uniqueness result.

    The complete ordered field remains
    the complete ordered field.

    You have the freedom to write
    non.standard field axioms.
    If they don't describe the complete ordered field,
    then they aren't complete.ordered.field axioms.

    It does not follow from
    not.the.complete.ordered.field being countable that
    the complete ordered field is countable.

    Then, another thing is about
    a deconstructive account of complex analysis about
    the very definition of complex numbers a + bi and
    the definition of the operations upon them.
    The thing is that division, for complex numbers,
    the definition of division, can be de-constructed,
    left and right,
    so that now there are non-principal branches of
    division, in complex numbers.

    The complex field remains
    the complex field.

    The complex field has
    single.valued division for non.0 numbers.

    You have the freedom to describe (deconstructively?)
    something with a different division.
    It will be something different, not.the.complex.field.


    You (RF) have what I consider a non.standard use
    of the word 'hypocrisy'.
    'Hyposcrisyᴿꟳ' seems to refer to (for example)
    the practice of not.calling cats 'elephants'.

    If that is what you mean, and you want
    less hypocrisyᴿꟳ (whatever reasons you have),
    you would do better by pointing out
    the advantages of calling cats 'elephants'
    (whatever advantages it has),
    as distinct from calling cats 'elephants' yourself,
    and distinct from entertaining us with stories of
    classical figures calling cats 'elephants', etc.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)