Hansen, Vagn Lundagaard <br/><br/>
Functional analysis: Entering hilbert space 
Hansen, Vagn Lundagaard 
 - 2nd 
 - Singapore   World Scientific  2020 
 - xvi, 176p. ill. 
<br/><br/><label>ISBN: </label>9780000988690 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Hilbert spaces<br/> Spectral theory<br/>Mathematics