Indifference curve

Summary

An indifference curve for a bundle \(\left( x_1,x_2 \right)\) is the collection of all bundles \(\left( y_1,y_2 \right)\) for which \(\left( y_1,y_2 \right)∼\left( x_1,x_2 \right)\) ,

\[\{ \left( y_1,y_2 \right)∈R^2 | \left( y_1,y_2 \right)∼\left( x_1,x_2 \right) \}\]