Recent Publications (Last Update 2004)
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Specral isometries of operator algebras,
(with M. Mathieu),
Archiv der Mathematik, 2004 pdf
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Linear maps on matrix algebra that preserve the numerical range,
numerical radius or the states
(with C. K. Li),
Cnd. J. Math. 56, (2004), 134 - 167.
pdf
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Isometries of block triangular matrix algebras with respect to Ky-Fan norms,
(with C. K. Li and P. Semrl),
Archiv der Mathematik, to appear.
81, (2003), 175 - 181.
pdf
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The semigroup generated by a similarity orbit or a unitary orbit of an
operator, (with C.K. Fong)
Proc. Amer. Math. Soc., 131 (2003), 3203 -- 3210.
pdf
- Conjugation-invariant subspaces and Lie ideals in
non-selfadjoint opeartor algebras, (with L. W. Marcoux)
J. London Math. Soc. (2)
65(2002), 493-512.
pdf
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Three linear preserver problems, Mathematics and the 21st century
211-221, World Sci. Publ. 2001.
pdf
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Semigroups generated by similarity orbits (with
L. Grunenfelder, M. Omladic and H. Radjavi)
Semigroup Forum, 62(2001), 460-472.
pdf
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Inequalities for products of spectral radii (with M. Omladic,
H. Radjavi and P. Rosenthal)
Proc. Amer. Math. Soc., 129(2001), 2239-2243.
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Additive rank-one preserving mappings on triangular matrix algebras
(with J. Bell)
Lin. Alg. Appl. 312 (2000), 13-33.
pdf
A copy of this paper is available from Lin. Alg. Appl.
Click here Then go to the June 2000 issue.
- Lie isomorphisms of nest algebras, (with L. W. Marcoux),
J. Funct. Anal., 164 (1999), 163-180.
pdf
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Maps on matrices that preserve the spectral radius distance,
(with R. Bhatia and P. Semrl),
Studia Math. 134 (1999), 99-110.
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Commutativity preserving linear maps and Lie automorphisms of triangular
matrix algebras (with L. W. Marcoux),
Lin. Alg. Appl. 288 (1999), 89-104
pdf
A copy of this paper is available from Lin. Alg. Appl.
Click here Then go to the February 1999 issue.
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Lie ideals in triangular operator algebras
(with T. D. Hudson and L. W. Marcoux),
Trans. Amer. Math. Soc. 350 (1998), 3321-3339.
pdf
A copy of this paper is available from the American Mathematical Society.&nb
sp;
Click here.
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Invertivility preserving linear maps on L(X),
Trans. Amer. Math. Soc. 350 (1998), 3321-3339.
A copy of this paper
is available from the American Mathematical Society. Click
here.
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Simultaneous triangularizability, near commutativity and Rota's theorem
(with A. A. Jafarian, H. Radjavi and P. Rosenthal)
Trans. Amer. Math. Soc.
347 (1995), no. 6, 2191--2199.
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Spectral properties of the the operator equation AX+XB=C (with
W. Arendt and F. Räbiger)
Quart. J. Math. Oxford Ser. (2)
45 (1994), no. 6, 133-149.