Adding members of the Cantor set to get $[0,2]$
69534
Measure of the Cantor set plus the Cantor set
43283
More numbers between $[0,1]$ or $[1,\infty)$?
44689
Explicit bijection between $[0,1)$ and $(0,1)$
68230
The cardinality of a countable union of sets with less than continuum cardinality
107614
Partitioning an infinite set
70327
the numer of partial function between two sets in combinatoric way
147484
For a set with N members, what is the number of set partitions in which each subset is either of size 1 or 2?
153305
Adding subsets of regular cardinals (Jech p. 226)
38257
Continuous bijection from $(0,1)$ to $[0,1]$
272
Cantor Sets/nonempty/cardinality
84751
How can it be possible to localize a ring at a set with zero divisors?
110669
Linear span of the empty set
100072
Can we add an uncountable number of positive elements, and can this sum be finite?
20135
Measure of  reals in $[0,1]$ which don't have $4$ in decimal expansion
80156
Formatting the union of sets
121366
Intervals and cardinality
14048
Proof that the complement of zero-measure set on $[0,1]$ is dense in $[0,1]$