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September 28, 2008

2^2=4

devadutta @ 10:44 pm, GMT +0000 ( 1222641866 ) Play

Math question. What is this operation called?

Computer scientis write it like this

Cracked by: Goyal , Achilles , nihit , Keerthi M R , Phani , Dibyo , varuns88 , shenoyvarun86 , akhi , madhur , sidsen , Ananth , udupendra and  mandakhawke.

Answer:

Tetration or Knuth’s Up Arrow notation.

a^^b = (a^(a^(a.. b times)))


14 Responses to “2^2=4”

  1. Goyal
    3
    2
    1

    Ackerman Function – Knuth\’s up-arrow notation


  2. Achilles
    1

    Rudy Rucker’s Infinity and Mind says a lot about this notation called Tetration,an iterated exponential.
    Iterating a to power of a b times,we get this tetration.
    Donald Knuth’s up-arrow notation is shown in the second.


  3. nihit
    1

    Tetration


  4. Keerthi M R

    Tetration – http://en.wikipedia.org/wiki/K.....w_notation


  5. Phani

    Tetration


  6. Dibyo
    11
    14
    10

    Tetration?


  7. varuns88
    4
    2
    2

    Tetration.


  8. Knuths up arrow notation


  9. akhi
    2
    1

    Tetration /Knuth’s up arrow notation.

    a power a power a power….. b times..


  10. madhur
    1

    Tetration


  11. sidsen
    2

    knuths up arrow


  12. Ananth
    4
    5
    9

    Iterated exponentiation or tetration. Invented by Don Knuth.


  13. udupendra
    4
    4
    7

    Iterated powers da…

    a^(a^(a^(… and so on b times)))


  14. mandakhawke

    Tetration ..Iterated Exponential


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