Man-Duen Choi

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Positive semidefinite biquadratic forms

Man-Duen Choi, 1975 .

Completely positive linear maps on complex matrices

Man-Duen Choi, 1975 .

TRICKS OR TREATS WITH THE HILBERT MATRIX

Man-Duen Choi, 1983 .

Even symmetric sextics

B. Reznick, T. Lam, Man-Duen Choi, 1987 .

Completely order Isomorphic and Close C*-Algebras need not BE, *-Isomorphic

Man-Duen Choi, Erik Christensen, 1983 .

Extremal positive semidefinite forms

Man-Duen Choi, T. Lam, 1977 .

Product numerical range in a space with tensor product structure

Jaroslaw Adam Miszczak, Man-Duen Choi, K. Życzkowski, 2010, 1008.3482.

A schwarz inequality for positive linear maps on $C^{\ast}$-algebras

Man-Duen Choi, 1974 .

The multiplicative domain in quantum error correction

Man-Duen Choi, N. Johnston, D. Kribs, 2008, 0811.0947.

Lifting Problems and the Cohomology of C*-Algebras

E. Effros, Man-Duen Choi, 1977, Canadian Journal of Mathematics.

Nuclear C ∗ -Algebras and the Approximation Property

E. Effros, Man-Duen Choi, 1978 .

Symmetry in the Cuntz algebra on two generators

Man-Duen Choi, F. Latrémolière, 2010, 1010.5842.

The C*-algebra of symmetric words in two universal unitaries

Man-Duen Choi, F. Latrémolière, 2006, math/0610467.

Separable nuclear $C^\ast$-algebras and injectivity

E. Effros, Man-Duen Choi, 1976 .

Higher-Rank Numerical Ranges of Unitary and Normal Matrices

Man-Duen Choi, K. Życzkowski, J. Holbrook, 2006, quant-ph/0608244.

Norm bounds for summation of two normal matrices

Chi-Kwong Li, Man-Duen Choi, 2004 .

Method to find quantum noiseless subsystems.

Man-Duen Choi, D. Kribs, 2005, Physical review letters.

Crossed-product C*-algebras for conformal automorphisms of the disk

Man-Duen Choi, F. Latrémolière, 2005, math/0511331.

The C*-algebra of symmetric words in two universal unitaries

Man-Duen Choi, F. Latrémolière, 2006, math/0610467.

Higher-rank numerical ranges and compression problems

Man-Duen Choi, K. Życzkowski, D. Kribs, 2005, math/0511278.

Positive Linear Maps on C*-Algebras

Man-Duen Choi, Man Duen Choi, 1972, Canadian Journal of Mathematics.

Real zeros of positive semidefinite forms. I

Bruce Reznick, Tsit Yuen Lam, B. Reznick, 1980 .

A Survey of Chandler Davis

Man-Duen Choi, P. Rosenthal, 1994 .

The completely positive lifting problem for C*-algebras

E. Effros, Man-Duen Choi, 1976 .

Injectivity and operator spaces

Edward G. Effros, E. Effros, Man-Duen Choi, 1977 .

THE FULL C* -ALGEBRA OF THE FREE GROUP ON TWO GENERATORS

Man-Duen Choi, 1980 .

Positive sextics and Schur's inequalities

B. Reznick, Man-Duen Choi, T. Lam, 1991 .

Sums of 2m-th powers of rational functions in one variable over real closed fields

B. Reznick, A. Prestel, Man-Duen Choi, 1996 .

On unital qubit channels

Chi-Kwong Li, Man-Duen Choi, 2023, Quantum Inf. Comput..

Comparing a Matrix to its Off-Diagonal Part

Rajendra Bhatia, Chandler Davis, Chandler Davis, 1989 .

Gauss polynomials and the rotation algebra

Man-Duen Choi, N. Yui, G. Elliott, 1990 .

Quantum error correcting codes from the compression formalism

Karol Zyczkowski, David W. Kribs, Man-Duen Choi, 2005, quant-ph/0511101.

Linear-algebraic results associated with antiferromagnetic Heisenberg chains

J. Rosenthal, Man-Duen Choi, P. Rosenthal, 1993 .

Equivalence of certain entropy contraction coefficients

Eugene Seneta, Mary Beth Ruskai, E. Seneta, 1994 .

The ultimate estimate of the upper norm bound for the summation of operators

Chi-Kwong Li, Man-Duen Choi, 2006 .

Some Convexity Features Associated with Unitary Orbits

Chi-Kwong Li, Man-Duen Choi, Y. Poon, 2003, Canadian Journal of Mathematics.

Numerical ranges and dilations

Chi-Kwong Li, Man-Duen Choi, 2000 .

CONSTRAINED UNITARY DILATIONS AND NUMERICAL RANGES

Chi-Kwong Li, Chi-Kwong Li, Man-Duen Choi, 2001 .

Density of the self-adjoint elements with finite spectrum in an irrational rotation $C^*$-algebra.

Man-Duen Choi, G. A. Elliot, 1990 .

Transversal zeros and positive semidefinite forms

B. Reznick, Manfred Knebusch, Man-Duen Choi, 1982 .

Every invertible matrix is diagonally equivalent to a matrix with distinct eigenvalues

Chi-Kwong Li, Man-Duen Choi, Nung-Sing Sze, 2012 .

The Pythagoras number of some affine algebras and local algebras.

B. Reznick, M. Choi, Z. Dai, 1982 .

The spectral mapping theorem for joint approximate point spectrum

Chandler Davis, Man-Duen Choi, 1974 .

Sums of orthogonal projections

Man-Duen Choi, P. Wu, 2014 .

On commutators and invariant subspaces

Man-Duen Choi, H. Radjavi, C. Laurie, 1981 .

Sums of Squares in Some Integral Domains

Alex Rosenberg, Bruce Reznick, Tsit Yuen Lam, 1980 .

A Simple C*-Algebra Generated by Two Finite-Order Unitaries

Man-Duen Choi, 1979, Canadian Journal of Mathematics.