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\name{Professor Henry Wolkowicz}
\address{
Faculty of Mathematics\\
Department of Combinatorics and Optimization \\
Waterloo, Ontario, Canada  N2L 3G1 \\
phone: 519-888-4567 x5589\\
URL: orion.math.uwaterloo.ca/\~{ }hwolkowi}
\email{hwolkowicz@uwaterloo.ca}
\date{\today}
\signature{Professor Henry Wolkowicz \\
}
\begin{letter}
{
Re: Visit of PhD student David Torregrosal
}

This letter is in support of the four month visit, Dec. 2022 to April,
2023, of Phd student David Torregrosal.
The visit is for research work in Continuous Optimization with Walaa
Moursi and Henry Wolkowicz, in Dept. of Comb. and Opt.

David is a student of
Francisco Javier Aragon Artacho,
Department of Mathematics, University of Alicante, Spain.
(sites.google.com/site/franaragon/home)
Francisco is an international well known young researcher who
already has an excellent well established research record
www.dropbox.com/s/llspwquh3q4vn9n/CV. His research overlaps that of both
Walla and Henry in modern optimization algorithms as well as stability
analysis.

We (Walla and Henry) are certain of a mutually beneficial visit for us
and our research group.







\closing{Yours Sincerely,\\
%\closing{Yours Sincerely,
\epsfig{figure=signature.ps,width=3in}
Prof. Walaa Moursi and Henry Wolkowicz
}




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