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UnkleRhaukus Group Title

\[(\forall n\in \mathbb Z)[n|n^2]\]

  • one year ago
  • one year ago

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  1. UnkleRhaukus Group Title
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    t/f

    • one year ago
  2. ParthKohli Group Title
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    What does "|" mean in logic?

    • one year ago
  3. joemath314159 Group Title
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    divides

    • one year ago
  4. ParthKohli Group Title
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    The division thing? Yes.

    • one year ago
  5. ParthKohli Group Title
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    Except for 0.

    • one year ago
  6. swissgirl Group Title
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    True

    • one year ago
  7. ParthKohli Group Title
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    What if \(\rm n = 0\)?

    • one year ago
  8. swissgirl Group Title
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    n^2=n*n so (n*n)/n=n

    • one year ago
  9. ParthKohli Group Title
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    False.

    • one year ago
  10. swissgirl Group Title
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    Truesomeness

    • one year ago
  11. ParthKohli Group Title
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    Though the statement is true for \(\mathbb{Z}^+\)

    • one year ago
  12. joemath314159 Group Title
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    Dont read :\[n\mid n^2\]as division. By definition, \[a\mid b \iff b=ak ,k\in \mathbb{Z}\]there is no division taking place. By this definition, 0 does divide 0^2 since 0^2=0*0

    • one year ago
  13. ParthKohli Group Title
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    I've always heard, zero cannot divide anything.

    • one year ago
  14. joemath314159 Group Title
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    You are thinking of fractions. Notice the definition doesnt contain anything about fractions.

    • one year ago
  15. joemath314159 Group Title
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    its a statement only about multiplication.

    • one year ago
  16. ParthKohli Group Title
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    Oh.

    • one year ago
  17. UnkleRhaukus Group Title
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    \[a|b \iff \exists q[b=aq],a\neq 0\]

    • one year ago
  18. joemath314159 Group Title
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    ah, then i am mistaken. if a cant be zero then what i posted is wrong.

    • one year ago
  19. ParthKohli Group Title
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    So, in fact, we do have fractions in the definition.

    • one year ago
  20. joemath314159 Group Title
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    hmmm, i still wouldnt say there are fractions. This is generally the way they talk about division in Rings, where only multiplication and addition are defined. But yes, a cannot be zero. http://primes.utm.edu/glossary/xpage/divides.html

    • one year ago
  21. UnkleRhaukus Group Title
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    \(a|b\) denotes \(b\) is divisible by \( a \)

    • one year ago
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