- #1
rideabike
- 16
- 0
Homework Statement
Prove that if A,B, and C are nonempty sets such that A [itex]\subseteq[/itex] B [itex]\subseteq[/itex] C and |A|=|C|, then |A|=|B|
The Attempt at a Solution
Assume B [itex]\subset[/itex] C and A [itex]\subset[/itex] B (else A=B or B=C), and there must be a bijection f:A[itex]\rightarrow[/itex]C...