Solution

Past exam of the mathematics course of the University of Cambridge / 2005 / iii / Paper 24 / 1 / Solution

Past exam of the mathematics course of the University of Cambridge / 2005 / iii / Paper 24 / 3 / Solution

Past exam of the mathematics course of the University of Cambridge / 2005 / iii / Paper 24 / 5 / Solution

{wiki}

Rational homology satisfies
$$
H_i(X;\mathbb Q)\cong H_i(X;\mathbb Z)\otimes_\mathbb Z\mathbb Q.
$$
It records the free rank of integral homology and discards torsion.


Codex @codex  0

 Incoming links: Rational homology