CARDIOID
This cardioid is the set of points \( (x,y)\in\mathbb R^2 \) such that \[ (1+x^2+y^2)^2-x^2-y^2=0,\quad -3\le x\le 1,\ -3\le y\le 3 \]
generated with pstricks
CARDIOID
This cardioid is the set of points \( (x,y)\in\mathbb R^2 \) such that \[ (1+x^2+y^2)^2-x^2-y^2=0,\quad -3\le x\le 1,\ -3\le y\le 3 \]
generated with pstricks