- #1
semidevil
- 157
- 2
so let's say |a| = 30. How many left cosets of <a^4> in <a> are there?
ok, so |a| = 30. and think I need to find the order of <a^4> also. I thought the order of it is
<a^4> = e, a^4, a^8, a^12, a^16, a^20, a^24, a^28. so it has order of 8. but my book said the order of it is 15...
is there a formula they used to figure this out?
ok, so |a| = 30. and think I need to find the order of <a^4> also. I thought the order of it is
<a^4> = e, a^4, a^8, a^12, a^16, a^20, a^24, a^28. so it has order of 8. but my book said the order of it is 15...
is there a formula they used to figure this out?