x < p − 2 p 2 + 1 4 {\displaystyle x<p-2p^{2}+{\frac {1}{4}}}
p = ( x − 1 4 ) 2 + y 2 {\displaystyle p={\sqrt {(x-{\frac {1}{4}})^{2}+y^{2}}}}
( x + 1 ) 2 + y 2 < 1 16 {\displaystyle (x+1)^{2}+y^{2}<{\frac {1}{16}}}
