by **Giuseppe Marino (Università della Calabria, Italy) and Paolamaria Pietramala (Università della Calabria, Italy)**

This article originally appeared in:

**Mathematics Magazine****December, 1993**

**Analysis | Functional Analysis | Hilbert Spaces**

Applicable Course(s):

**4.12 Advanced Math for Engineering & Physics**

*Construction of a counterexample of concerning compact self-adjoint operators from the existence of a special orthonormal basis in Hilbert Space*

A pdf copy of the article can be viewed by clicking below. Since the copy is a faithful reproduction of the actual journal pages, the article may not begin at the top of the first page.

To open this file please click here.

*These pdf files are furnished by JSTOR.*

Classroom Capsules would not be possible without the contribution of JSTOR.

*JSTOR provides online access to pdf copies of 512 journals, including all three print journals of the Mathematical Association of America: The American Mathematical Monthly, College Mathematics Journal, and Mathematics Magazine. We are grateful for JSTOR's cooperation in providing the pdf pages that we are using for Classroom Capsules.*