>>708
>>”｜R｜<｜R/Q｜”の｜R/Q｜の濃度は、
>>アレフ1の上でアレフ2未満ということだろう
>そもそも、その場合、Rの濃度がアレフ１じゃないけど

スレ主です
ご指摘ありがとう
そうだった
Rの濃度は、下記"c"ですね
謹んで訂正します

（参考）
https://en.wikipedia.org/wiki/Cardinality
Cardinality

Cardinal numbers
Assuming the axiom of choice, the cardinalities of the infinite sets are denoted
ℵ0<ℵ1<ℵ2<…
For each ordinal α ,ℵα+1
is the least cardinal number greater than ℵα.

The cardinality of the natural numbers is denoted aleph-null (ℵ0), while the cardinality of the real numbers is denoted by "c" (a lowercase fraktur script "c"), and is also referred to as the cardinality of the continuum. Cantor showed, using the diagonal argument, that
c>ℵ0. We can show that
c=2^ℵ0 , this also being the cardinality of the set of all subsets of the natural numbers.
The continuum hypothesis says that
ℵ1=2^ℵ0, i.e.
2^ℵ0 is the smallest cardinal number bigger than
ℵ0, i.e. there is no set whose cardinality is strictly between that of the integers and that of the real numbers.
The continuum hypothesis is independent of ZFC, a standard axiomatization of set theory; that is, it is impossible to prove the continuum hypothesis or its negation from ZFC—provided that ZFC is consistent.
For more detail, see § Cardinality of the continuum below.[13][14][15]