

I am a Professor in the Mathematics Department at Cal Poly, San Luis Obispo. My office is #308 in Faculty Offices East, Bldg. 25. I am a faculty advisor to the Math Club. Winter 2017: I teach Math 241, Math 143, and Math 409. 
Research Papers:
1. Adjoints of Composition Operators with Irrational Symbol
(with Caixing Gu and Erin Rizzie)
This paper will appear in Proceedings of the American Mathematical Society.
Click here for the abstract,
or pick one of the following to view the whole paper:
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2. Toeplitzness of products of composition operators
and their adjoints, (with Chad Duna, Caixing Gu, and Matthew Gagne)
This paper appears in the Journal of Mathematical Analysis and Applications, (2013).
You can see it on their web site (subscription may be necessary) here.
Click here for the abstract,
or pick one of the following to view the whole paper:
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3. Norms of Composition Operators with Rational Symbol
(with Sean EffingerDean, Alan Johnson, and Joseph Reed)
This paper appears in the Journal of Mathematical Analysis and Applications,
324 (2006) 10621072.
You can see it on their web site (subscription may be necessary) here.
Click here for the abstract,
or pick one of the following to view the whole paper:
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, DVI
format , or AMSLaTeX
file
4. Continuity of the Norm of a Composition Operator (with
David Pokorny)
This paper appears in the journal Integral Equations and Operator Theory,
Volume 45, Issue 3, March 2003, pp 351358.
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or pick one of the following to view the whole paper:
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, DVI
format , or AMSLaTeX
file
5. Strict Convexity of Some Subsets of Hankel
Operators (with Caixing Gu)
This paper appears in the Proceedings of the American Mathematical Society,
Volume 131, Number 9 (2003), 27792789.
You can see it on their web site here.
Click here for the abstract,
or pick one of the following to view the whole paper:
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, DVI
format , or AMSLaTeX file
6. Kernels of Hankel Operators and Hyponormality of
Toeplitz Operators (with Caixing Gu)
This paper appears in Mathematische Annalen, Volume 319 Issue 3 (2001) pp
553571.
You can see it on their web site here
.
Click here for the abstract,
or pick one of the following to view the whole paper:
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, DVI
format , or AMSLaTeX
file
7. The Essential Norm of a Composition Operator on a
Planar Domain (with Stephen D. Fisher)
This paper appears in the Illinois Journal of Mathematics, 43 (1999), 113130.
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or pick one of the following to view the whole paper:
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, DVI format
, or AMSLaTeX
file
8. Aleksandrov Measures Used in Essential Norm
Inequalities for Composition Operators
This paper appears in the Journal of Operator Theory, 40 (1998), 133146.
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or pick one of the following to view the whole paper:
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AMSLaTeX file
9. Singular Factors are Rare (with Stephen
D. Fisher)
This paper appears in the Michigan Mathematical Journal, 44 (1997), 231237.
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or pick one of the following to view the whole paper:
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, DVI
format , or AMSLaTeX
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10. Relative Angular Derivatives
This paper appears in the Journal of Operator Theory, 46 (2001), 265280.
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format , or AMSLaTeX file
11. More Relative Angular Derivatives
This paper appears in the Journal of Operator Theory, 49 (2003), 8597.
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or pick one of the following to view the whole paper:
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Winter 2017 Office Hours in
308 Faculty Offices East (Bldg. 25):
Monday: 2:10 pm – 3:00 pm
Tuesday: 2:10 pm  3:00 pm
Thursday: 8:10 am  9:00 am and 2:10 pm  3:00 pm
Friday: 8:10 am  9:00 am
Drop by, email me, or call me at my office phone: 7561675 with any
questions or to make an appointment.
Contact information for Jonathan Shapiro:
Mathematics
Department
California Polytechnic State University
San Luis Obispo, CA 93407
Phone: (805) 7561675
Fax: (515) 5810865
jshapiro@calpoly.edu