15/02/16 18:05:57.62 bp+E3dAC.net
>>34
α,β≧ℵ_0 ならば、αxβ = α+β = max {α,β}、
|RxR| = |R|、
E ⊇S, |E| > ℵ_0, |S| ≦ℵ_0 ならば、|E-S| = |E|
∴ |C^{x}| = |RxR - {(0,0)}| = |RxR| = |R| = 2^{ℵ_0}
15/02/16 18:05:57.62 bp+E3dAC.net
>>34
α,β≧ℵ_0 ならば、αxβ = α+β = max {α,β}、
|RxR| = |R|、
E ⊇S, |E| > ℵ_0, |S| ≦ℵ_0 ならば、|E-S| = |E|
∴ |C^{x}| = |RxR - {(0,0)}| = |RxR| = |R| = 2^{ℵ_0}