What is a pareto optimal strategy for two player general sum games?

Question

What is the definition that a strategy for player one and player two to be pareto optimal?

Answer 1

An outcome of a game is pareto optimal, if there is no other outcome that makes at least one player better off and no player worse off.

$$\begin{array}{|m{cm}|m{1cm}|} \hline \text{Player 1 / Player 2} & \text{strategy 1} &\text{strategy 2} \\ \hline \hline \hline\text{strategy 1}& 10/10 &0/15\\ \hline \text{strategy 2}& 12/8&3/3 \\ \hline \end{array}$$

Thus the pareto optimal outcomes are $(10/10);(0/15);(12/8)$