# Homework Help: Same cardinality

1. Sep 21, 2011

### burak100

1. The problem statement, all variables and given/known data

$F(\mathbb{Q},\mathbb{R})$ is the set of maps from $\mathbb{Q}$ to $\mathbb{R}$. Then show that $F(\mathbb{Q},\mathbb{R})$ and $\mathbb{R}$ have same potency (cardinal number?)..

2. Relevant equations

3. The attempt at a solution

I am no tsure but I think I need to find bijection map between these sets, but how???

2. Sep 21, 2011

### micromass

What is the cardinal number of $F(\mathbb{Q},\mathbb{R})$??