Example of measure for some algebra over $mathbb N$












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$mathcal F$ is a set of events ($sigma$-algebra). Can you give an example for some algebra $mathcal A$ over $mathbb N$ a non-zero finite additive measure $mu $
on this algebra, which has a countably additive extension to the $sigma$-algebra generated by this algebra,
moreover, when shifting any set $A ∈ mathcal F$ by an integer $n$, for the so obtained set $A + n$
was fulfilled: $A + n ∈ A$, $mu (A + n) = mu $(A)?










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$endgroup$

















    1












    $begingroup$


    $mathcal F$ is a set of events ($sigma$-algebra). Can you give an example for some algebra $mathcal A$ over $mathbb N$ a non-zero finite additive measure $mu $
    on this algebra, which has a countably additive extension to the $sigma$-algebra generated by this algebra,
    moreover, when shifting any set $A ∈ mathcal F$ by an integer $n$, for the so obtained set $A + n$
    was fulfilled: $A + n ∈ A$, $mu (A + n) = mu $(A)?










    share|cite|improve this question











    $endgroup$















      1












      1








      1


      1



      $begingroup$


      $mathcal F$ is a set of events ($sigma$-algebra). Can you give an example for some algebra $mathcal A$ over $mathbb N$ a non-zero finite additive measure $mu $
      on this algebra, which has a countably additive extension to the $sigma$-algebra generated by this algebra,
      moreover, when shifting any set $A ∈ mathcal F$ by an integer $n$, for the so obtained set $A + n$
      was fulfilled: $A + n ∈ A$, $mu (A + n) = mu $(A)?










      share|cite|improve this question











      $endgroup$




      $mathcal F$ is a set of events ($sigma$-algebra). Can you give an example for some algebra $mathcal A$ over $mathbb N$ a non-zero finite additive measure $mu $
      on this algebra, which has a countably additive extension to the $sigma$-algebra generated by this algebra,
      moreover, when shifting any set $A ∈ mathcal F$ by an integer $n$, for the so obtained set $A + n$
      was fulfilled: $A + n ∈ A$, $mu (A + n) = mu $(A)?







      probability-theory measure-theory examples-counterexamples outer-measure






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      edited Dec 3 '18 at 9:22







      Lisa

















      asked Nov 26 '18 at 3:38









      LisaLisa

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