2

Can someone provide a proof or a source containing a proof of the version of the Riesz-Fisher Theorem provided here: http://en.wikipedia.org/wiki/Riesz%E2%80%93Fischer_theorem#Modern_forms_of_the_theorem?

1 Answers1

1

It's on page 248 of the second edition of Folland's Real Analysis. Check the remarks following the proof of theorem 8.20.

It's also in Rudin's Real and Complex Analysis.

Potato
  • 40,171