I am trying to calculate the fundamental group of $\mathbb{R}^3- \{ x\text{-axis}\cup y\text{-axis}\cup z\text{-axis}\}$.
Idea: I think we can show it deformation retracts on 2-sphere minus 4 points.
I am trying to calculate the fundamental group of $\mathbb{R}^3- \{ x\text{-axis}\cup y\text{-axis}\cup z\text{-axis}\}$.
Idea: I think we can show it deformation retracts on 2-sphere minus 4 points.