I'm studying the article "Some Rigorous Results on the Sherrington-Kirkpatrick Spin Glass Model" (1987, Aizenman, Lebowitz and Ruelle). In the beginning of section 3 of the article, they cite the following result:
And as a reference, they give Feller's "An Introduction to Probability Theory and Its Applications, Vol II".
Can someone refer me to the location in Feller's book, or another resource, where I can find a statement and proof of this result?
Thank you