Leandro G. Barajas
Erdös Number 4

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Erdös, Paul; Shapiro, Harold S.; Shields, A.L.
Large and small subspaces of Hilbert space, Mich. Math. J. 12, 169-178 (1965).
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Blondel, Vincent D.; Rupp, Rudolf; Shapiro, Harold S.
On zero and one points of analytic functions, Complex Variables, Theory Appl. 28, No.2, 189-192 (1995).
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Egerstedt, Magnus; Blondel, Vincent D.
How hard is it to control switched systems? Proceedings of the American Control Conference, Vol. 3, 1869 -1873 (2000).
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Barajas, Leandro G. ; Egerstedt, Magnus; Kamen, Edward W.; Goldstein, Alex
Process control in a high-noise environment with limited number of measurements,
Proceedings of the 2003 American Control Conference, Vol. 1, 597-602 (2003)