![](/img/cover-not-exists.png)
On self-adjointness of the product of two second-order differential operators
Zhijiang Cao, Jiong Sun, D. E. EdmundsVolume:
15
Language:
english
Pages:
12
DOI:
10.1007/bf02650732
Date:
July, 1999
File:
PDF, 429 KB
english, 1999