Where do the enormous simple groups come from?












2












$begingroup$


I mean, these simple groups of big order such as
808017424794512875886459904961710757005754368000000000



I think it's order is something similar to a factorial for all those 0s... but I'd like to know how were these built...










share|cite|improve this question











$endgroup$








  • 2




    $begingroup$
    I assume you're referring to the sporadic groups. There are finite simple groups of arbitrarily large order.
    $endgroup$
    – Matt Samuel
    Mar 8 '15 at 19:50






  • 1




    $begingroup$
    Related: What is the simplest way to fathom the Monster Group?, Why is the Monster group the largest sporadic finite simple group?.
    $endgroup$
    – MJD
    Mar 8 '15 at 19:51










  • $begingroup$
    I think this q/a on MathOverflow would be helpful: mathoverflow.net/questions/38161/… .
    $endgroup$
    – zibadawa timmy
    Mar 8 '15 at 19:57






  • 1




    $begingroup$
    recommend maa.org/publications/maa-reviews/…
    $endgroup$
    – Will Jagy
    Mar 8 '15 at 20:40
















2












$begingroup$


I mean, these simple groups of big order such as
808017424794512875886459904961710757005754368000000000



I think it's order is something similar to a factorial for all those 0s... but I'd like to know how were these built...










share|cite|improve this question











$endgroup$








  • 2




    $begingroup$
    I assume you're referring to the sporadic groups. There are finite simple groups of arbitrarily large order.
    $endgroup$
    – Matt Samuel
    Mar 8 '15 at 19:50






  • 1




    $begingroup$
    Related: What is the simplest way to fathom the Monster Group?, Why is the Monster group the largest sporadic finite simple group?.
    $endgroup$
    – MJD
    Mar 8 '15 at 19:51










  • $begingroup$
    I think this q/a on MathOverflow would be helpful: mathoverflow.net/questions/38161/… .
    $endgroup$
    – zibadawa timmy
    Mar 8 '15 at 19:57






  • 1




    $begingroup$
    recommend maa.org/publications/maa-reviews/…
    $endgroup$
    – Will Jagy
    Mar 8 '15 at 20:40














2












2








2


1



$begingroup$


I mean, these simple groups of big order such as
808017424794512875886459904961710757005754368000000000



I think it's order is something similar to a factorial for all those 0s... but I'd like to know how were these built...










share|cite|improve this question











$endgroup$




I mean, these simple groups of big order such as
808017424794512875886459904961710757005754368000000000



I think it's order is something similar to a factorial for all those 0s... but I'd like to know how were these built...







abstract-algebra group-theory finite-groups simple-groups






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Mar 8 '15 at 19:51









Matt Samuel

39.3k63870




39.3k63870










asked Mar 8 '15 at 19:48









David MolanoDavid Molano

1,440721




1,440721








  • 2




    $begingroup$
    I assume you're referring to the sporadic groups. There are finite simple groups of arbitrarily large order.
    $endgroup$
    – Matt Samuel
    Mar 8 '15 at 19:50






  • 1




    $begingroup$
    Related: What is the simplest way to fathom the Monster Group?, Why is the Monster group the largest sporadic finite simple group?.
    $endgroup$
    – MJD
    Mar 8 '15 at 19:51










  • $begingroup$
    I think this q/a on MathOverflow would be helpful: mathoverflow.net/questions/38161/… .
    $endgroup$
    – zibadawa timmy
    Mar 8 '15 at 19:57






  • 1




    $begingroup$
    recommend maa.org/publications/maa-reviews/…
    $endgroup$
    – Will Jagy
    Mar 8 '15 at 20:40














  • 2




    $begingroup$
    I assume you're referring to the sporadic groups. There are finite simple groups of arbitrarily large order.
    $endgroup$
    – Matt Samuel
    Mar 8 '15 at 19:50






  • 1




    $begingroup$
    Related: What is the simplest way to fathom the Monster Group?, Why is the Monster group the largest sporadic finite simple group?.
    $endgroup$
    – MJD
    Mar 8 '15 at 19:51










  • $begingroup$
    I think this q/a on MathOverflow would be helpful: mathoverflow.net/questions/38161/… .
    $endgroup$
    – zibadawa timmy
    Mar 8 '15 at 19:57






  • 1




    $begingroup$
    recommend maa.org/publications/maa-reviews/…
    $endgroup$
    – Will Jagy
    Mar 8 '15 at 20:40








2




2




$begingroup$
I assume you're referring to the sporadic groups. There are finite simple groups of arbitrarily large order.
$endgroup$
– Matt Samuel
Mar 8 '15 at 19:50




$begingroup$
I assume you're referring to the sporadic groups. There are finite simple groups of arbitrarily large order.
$endgroup$
– Matt Samuel
Mar 8 '15 at 19:50




1




1




$begingroup$
Related: What is the simplest way to fathom the Monster Group?, Why is the Monster group the largest sporadic finite simple group?.
$endgroup$
– MJD
Mar 8 '15 at 19:51




$begingroup$
Related: What is the simplest way to fathom the Monster Group?, Why is the Monster group the largest sporadic finite simple group?.
$endgroup$
– MJD
Mar 8 '15 at 19:51












$begingroup$
I think this q/a on MathOverflow would be helpful: mathoverflow.net/questions/38161/… .
$endgroup$
– zibadawa timmy
Mar 8 '15 at 19:57




$begingroup$
I think this q/a on MathOverflow would be helpful: mathoverflow.net/questions/38161/… .
$endgroup$
– zibadawa timmy
Mar 8 '15 at 19:57




1




1




$begingroup$
recommend maa.org/publications/maa-reviews/…
$endgroup$
– Will Jagy
Mar 8 '15 at 20:40




$begingroup$
recommend maa.org/publications/maa-reviews/…
$endgroup$
– Will Jagy
Mar 8 '15 at 20:40










1 Answer
1






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$begingroup$

(long for a comment..)



If you refer to the monster group, then I would suggest you this http://youtu.be/jsSeoGpiWsw - if John Conway says that he doesn't know why the monster group exists, I doubt that anyone can give a reasonable answer. In general, Matt Samuel's comment above is right, it is enough to consider a finite simple group of classical Lie type (i.e. certain matrices of size $n$ over a certain field) when $n$ goes to infinity the order of the group goes to infinity.



If you want a reason for why the study of finite simple groups is become important (from a theoretical point of view) then you should have a look at the Jordan-Hölder theorem, which states that every finite group is built up by a finite number of finite simple groups. Hence the finite simple groups are the elements of the 'periodic table of group theory'.






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    1 Answer
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    active

    oldest

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

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    active

    oldest

    votes









    3












    $begingroup$

    (long for a comment..)



    If you refer to the monster group, then I would suggest you this http://youtu.be/jsSeoGpiWsw - if John Conway says that he doesn't know why the monster group exists, I doubt that anyone can give a reasonable answer. In general, Matt Samuel's comment above is right, it is enough to consider a finite simple group of classical Lie type (i.e. certain matrices of size $n$ over a certain field) when $n$ goes to infinity the order of the group goes to infinity.



    If you want a reason for why the study of finite simple groups is become important (from a theoretical point of view) then you should have a look at the Jordan-Hölder theorem, which states that every finite group is built up by a finite number of finite simple groups. Hence the finite simple groups are the elements of the 'periodic table of group theory'.






    share|cite|improve this answer











    $endgroup$


















      3












      $begingroup$

      (long for a comment..)



      If you refer to the monster group, then I would suggest you this http://youtu.be/jsSeoGpiWsw - if John Conway says that he doesn't know why the monster group exists, I doubt that anyone can give a reasonable answer. In general, Matt Samuel's comment above is right, it is enough to consider a finite simple group of classical Lie type (i.e. certain matrices of size $n$ over a certain field) when $n$ goes to infinity the order of the group goes to infinity.



      If you want a reason for why the study of finite simple groups is become important (from a theoretical point of view) then you should have a look at the Jordan-Hölder theorem, which states that every finite group is built up by a finite number of finite simple groups. Hence the finite simple groups are the elements of the 'periodic table of group theory'.






      share|cite|improve this answer











      $endgroup$
















        3












        3








        3





        $begingroup$

        (long for a comment..)



        If you refer to the monster group, then I would suggest you this http://youtu.be/jsSeoGpiWsw - if John Conway says that he doesn't know why the monster group exists, I doubt that anyone can give a reasonable answer. In general, Matt Samuel's comment above is right, it is enough to consider a finite simple group of classical Lie type (i.e. certain matrices of size $n$ over a certain field) when $n$ goes to infinity the order of the group goes to infinity.



        If you want a reason for why the study of finite simple groups is become important (from a theoretical point of view) then you should have a look at the Jordan-Hölder theorem, which states that every finite group is built up by a finite number of finite simple groups. Hence the finite simple groups are the elements of the 'periodic table of group theory'.






        share|cite|improve this answer











        $endgroup$



        (long for a comment..)



        If you refer to the monster group, then I would suggest you this http://youtu.be/jsSeoGpiWsw - if John Conway says that he doesn't know why the monster group exists, I doubt that anyone can give a reasonable answer. In general, Matt Samuel's comment above is right, it is enough to consider a finite simple group of classical Lie type (i.e. certain matrices of size $n$ over a certain field) when $n$ goes to infinity the order of the group goes to infinity.



        If you want a reason for why the study of finite simple groups is become important (from a theoretical point of view) then you should have a look at the Jordan-Hölder theorem, which states that every finite group is built up by a finite number of finite simple groups. Hence the finite simple groups are the elements of the 'periodic table of group theory'.







        share|cite|improve this answer














        share|cite|improve this answer



        share|cite|improve this answer








        edited Jan 18 at 16:57









        Martin Sleziak

        45.1k10123277




        45.1k10123277










        answered Mar 9 '15 at 12:54









        rafforafforafforaffo

        616312




        616312






























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