@article {8615fe, AUTHOR = {Klebanov, I. and Sprungk, B. and Sullivan, T. J.}, TITLE = {{The linear conditional expectation in Hilbert space}}, FJOURNAL = {Bernoulli}, JOURNAL = {Bernoulli}, YEAR = {2021}, MRCLASS = {46E22, 28C20, 62C10, 62J05, 62G05}, }