# Math Help - help with proof techniques

1. ## help with proof techniques

The claim you need to prove in (a) has the form "for every $f$, ${O}(f)$ is a subset of $\Gamma(f)$. If you now what it means to prove a formula of each form, you can gradually rewrite the claim and then see what you can do about it. Start with: "Fix some arbitrary $f\in\mathcal{F}$. Need to prove: ${O}(f)\subseteq\Gamma(f)$."