http://i453.photobucket.com/albums/q...188/math19.jpg

Stuck on this question, struggling to see where to start.

Printable View

- March 23rd 2009, 06:44 AMmath_helpGroups
http://i453.photobucket.com/albums/q...188/math19.jpg

Stuck on this question, struggling to see where to start. - March 23rd 2009, 11:16 AMOpalg
Each element of HK is of the form hk, where . But there may be more than one way of representing the same element as such a product.

So suppose that . Then say, where (because and also ).

Use that to count the number of ways that each element of HK can be expressed as a product of the form hk. - March 24th 2009, 02:55 AMHalmos Rules
- March 25th 2009, 11:39 AMmath_help
What about the counter-example?

- March 25th 2009, 11:46 AMOpalg