Inverse of a element $A in mathbb{F}_{2^m}, A neq 0$ using Almost Inverse Algorithm












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I have been proposed in class to obtain the inverse of a given element in $mathbb{Z}_2$ field with the Almost Inverse Algorithm (AIA).
I do not understand very well how to obtain it since the result that the algorithm returns does not know what has to be applied to have the inverse form.



Let $ mathbb{F} = mathbb{Z}_{2}[X]/f(x) $ where $ f (x) = x ^ 4 + x ^ 3 + 1 $ calculate the inverse of $ x ^ 3 + x $
Almost Inverse Algorithm (AIA)



I would like to know if you could help me, showing me the iterations of the algorithm.










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    1












    $begingroup$


    I have been proposed in class to obtain the inverse of a given element in $mathbb{Z}_2$ field with the Almost Inverse Algorithm (AIA).
    I do not understand very well how to obtain it since the result that the algorithm returns does not know what has to be applied to have the inverse form.



    Let $ mathbb{F} = mathbb{Z}_{2}[X]/f(x) $ where $ f (x) = x ^ 4 + x ^ 3 + 1 $ calculate the inverse of $ x ^ 3 + x $
    Almost Inverse Algorithm (AIA)



    I would like to know if you could help me, showing me the iterations of the algorithm.










    share|cite|improve this question









    $endgroup$















      1












      1








      1





      $begingroup$


      I have been proposed in class to obtain the inverse of a given element in $mathbb{Z}_2$ field with the Almost Inverse Algorithm (AIA).
      I do not understand very well how to obtain it since the result that the algorithm returns does not know what has to be applied to have the inverse form.



      Let $ mathbb{F} = mathbb{Z}_{2}[X]/f(x) $ where $ f (x) = x ^ 4 + x ^ 3 + 1 $ calculate the inverse of $ x ^ 3 + x $
      Almost Inverse Algorithm (AIA)



      I would like to know if you could help me, showing me the iterations of the algorithm.










      share|cite|improve this question









      $endgroup$




      I have been proposed in class to obtain the inverse of a given element in $mathbb{Z}_2$ field with the Almost Inverse Algorithm (AIA).
      I do not understand very well how to obtain it since the result that the algorithm returns does not know what has to be applied to have the inverse form.



      Let $ mathbb{F} = mathbb{Z}_{2}[X]/f(x) $ where $ f (x) = x ^ 4 + x ^ 3 + 1 $ calculate the inverse of $ x ^ 3 + x $
      Almost Inverse Algorithm (AIA)



      I would like to know if you could help me, showing me the iterations of the algorithm.







      finite-groups euclidean-algorithm






      share|cite|improve this question













      share|cite|improve this question











      share|cite|improve this question




      share|cite|improve this question










      asked Jan 14 at 16:47









      Str0ngerStr0nger

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