November 6th, 2010, 09:25 AM  #1 
Newbie Joined: Nov 2010 Posts: 7 Thanks: 0  Subgroups
Original Question: Let G be an abelian group of order 540. What is the largest possible number of subgroups of order 3 such a group G can have? My attempt: The fundamental theorem of group theory says that any group G of order 540 can be expressed as G1 X G2 where G1 is a group of order 27 and G2 is a group of order 20. If I'm searching for every group of order 3, then I guess I'm actually searching for every element of order 3. (number of subgroups of order 3= number of elements of order 3 divides by 2). Since an element of order 3 can only be in G1, I need to be searching for elements of order 3 in a group of order 27. This will require classifying all groups of order 27, but I don't know how to classify these groups. Help? 
November 25th, 2010, 02:28 PM  #2  
Global Moderator Joined: Dec 2006 Posts: 20,746 Thanks: 2133  Quote:
 

Tags 
subgroups 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Subgroups  gaussrelatz  Algebra  1  October 10th, 2012 11:30 PM 
Normal subgroups  Fernando  Abstract Algebra  1  April 11th, 2012 12:40 AM 
Number of subgroups of Sn  honzik  Abstract Algebra  0  February 13th, 2011 06:45 AM 
Normal Subgroups  ejote  Abstract Algebra  4  February 1st, 2011 07:30 AM 
no subgroups  bjh5138  Abstract Algebra  2  August 14th, 2008 12:03 PM 