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Thread: 0/0?

  1. Apr 22nd, 2002, 08:16 PM #1
    markman
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    Question 0/0?

    what is 0/0?
    0/x = 0 but
    x/0 = protein infinity, and
    x/x = 1
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  2. Apr 22nd, 2002, 08:38 PM #2
    HarryW
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    It's undefined.
    Harry.

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  3. Apr 22nd, 2002, 10:06 PM #3
    Fonzdude
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    Originally posted by HarryW
    It's undefined.

    isnt that what computers and calculators say when div by zero becuase the number would be infinte
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  4. Apr 23rd, 2002, 04:08 AM #4
    Ambivalentiowa
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    Ummmm... the search function could help

    There's been a 300 page post on this already.
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  6. Apr 28th, 2002, 03:47 PM #5
    nishantp
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    Re: 0/0?

    Originally posted by markman
    x/0 = protein infinity
    This one applies. It can be thought of as either undefined or infinity.
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  7. Apr 28th, 2002, 04:22 PM #6
    Dillinger4
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    For floating point operations. Division by 0.0 will produce INF (4.0/0.0) -INF ((-4.0)/0.0) and (0.0/0.0) NAN.
    Last edited by Dilenger4; Apr 28th, 2002 at 04:29 PM.
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  8. Apr 29th, 2002, 08:33 PM #7
    Zaei
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    Quiet NaN's are the worst. It doesnt even tell you you just divided by 0.0f!

    Z.
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  9. May 1st, 2002, 12:25 PM #8
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  11. May 11th, 2002, 06:27 PM #9
    parksie
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    Originally posted by Zaei
    Quiet NaN's are the worst. It doesnt even tell you you just divided by 0.0f!

    Z.
    I prefer them actually, because it saves programmer effort for a minority case that the user will obviously notice (plus if you've coded your algorithm properly you should never end up dividing by zero or epsilon).
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  12. May 21st, 2002, 01:19 PM #10
    vsusi
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    Indeterminate

    Value of 0/0 is Indeterminate.

    Also for INF/INF is also Indertminate.

    Means that value cannot be determined.
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  13. May 24th, 2002, 12:34 PM #11
    csammis
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    In my high school calculus course (back in the day...), the first thing the teacher asked the class was to go home and ponder 0/x, x/0, and 0/0. Everyone knew 0/x = 0, nearly everyone who had read the material knew that x/0 = +- INF, but we had a two day discussion (with the teacher just sitting back and grinning) about what 0/0 could possibly be...the answer, as vsusi said, is that it's indeterminate. So technically, 0/x = 0 and x/0 = +- INF for all x != 0

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