Functions, spaces, and expansions :/  mathematical tools in physics and engineering / 
Ole Christensen. 
 - Boston, Mass. ::  Birkhäuser,  c2010. 
 - xix, 263 p. : 
<br/><br/><label>ISBN: </label>9780817649791 (pbk.) 
<br/><br/><label>Dewey Class. No.: </label>510  / OLE/F