I know that a torus the product of circles. But what the fundamental group of the product of a 3-sphere and a circle? ie $\pi_1((S^3 \times S^1), (1,1))$?
Thanks!
I know that a torus the product of circles. But what the fundamental group of the product of a 3-sphere and a circle? ie $\pi_1((S^3 \times S^1), (1,1))$?
Thanks!