Normal subgroup existence
06:00 20-Mar-10
[Replies: 3, Views: 93]
By: emptyboat
G H be groups(finite or infinite) Prove that if (G:H)=n then there exist some normal subgroup K of G (G:K)≤n! example) let G=A5 H=A4 then (G:H)=5 then K= id exists (G:K)≤5!
Reasons gravitons cannot exist
03:19 11-Mar-10
[Replies: 1, Views: 131]
By: adamz
Recently I have been trying to better understand gravity and electromagnetic forces at their fundamental natures
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