Cosine operator functions
M. Sova
GDML_Books, (1966), p.

CONTENTS0. Introduction............................................................................................................... 31. Preliminaries............................................................................................................ 32. Cosine operator functions..................................................................................... 63. Generation of cosine operator functions............................................................ 234. Cosine operator functions and semigroups of operators............................... 38References................................................................................................................... 46

EUDML-ID : urn:eudml:doc:268428 
@book{bwmeta1.element.desklight-7d6d0339-a98a-44f7-8f10-3018a6926767,
     author = {M. Sova},
     title = {Cosine operator functions},
     series = {GDML\_Books},
     publisher = {Instytut Matematyczny Polskiej Akademi Nauk},
     address = {Warszawa},
     year = {1966},
     language = {en},
     url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-7d6d0339-a98a-44f7-8f10-3018a6926767}
}

M. Sova. Cosine operator functions. GDML_Books (1966),  http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-7d6d0339-a98a-44f7-8f10-3018a6926767/