I'm doing Problem II.3.12 in textbook Analysis I by Amann/Escher.
I can not figure out what $p^2_F$ in (d) actually means. I'm not sure if $p^2_F$ means $p^2_F := p^F \circ p^F$.
My question: What is $p^2_F$?
Thank you for your help!
I'm doing Problem II.3.12 in textbook Analysis I by Amann/Escher.
I can not figure out what $p^2_F$ in (d) actually means. I'm not sure if $p^2_F$ means $p^2_F := p^F \circ p^F$.
My question: What is $p^2_F$?
Thank you for your help!
Your guess is correct; in this case, $p^2_F$ refers to the composition of $p_F$ with itself (which makes sense only because $F \subset E$).