M. D. Choi

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All published works

Action	Title	Year	Authors
+ PDF Chat	Lattice Polytopes with Distinct Pair-Sums	2002	M. D. Choi T. Y. Lam Bruce Reznick
+	Lattice polytopes with distinct pair-sums	2000	M. D. Choi T. Y. Lam Bruce Reznick
+	Sums of 2m-th powers of rational functions in one variable over real closed fields	1996	M. D. Choi T. Y. Lam A. Prestel Bruce Reznick
+	Sums of 2m-th powers of rational functions in one variable over real closed fields	1996	M. D. Choi T. Y. Lam A. Prestel Bruce Reznick
+	Positive sextics and Schur's inequalities	1991	M. D. Choi T. Y. Lam Bruce Reznick
+	Even symmetric sextics	1987	M. D. Choi T. Y. Lam Bruce Reznick
+	On the congruence numerical range and related functions of matrices	1987	M. D. Choi Cecelia Laurie Heydar Radjavi Peter Rosenthal
+	Linear maps preserving commutativity	1987	M. D. Choi Ali Jafarian Heydar Radjavi
+	Non-Linear Completely Positive Maps	1986	T. Andô M. D. Choi
+	On positive linear maps preserving invertibility	1984	M. D. Choi Don Hadwin Eric Nordgren Heydar Radjavi Peter Rosenthal
+	The Pythagoras number of some affine algebras and local algebras.	1982	M. D. Choi Zhehao Dai T. Y. Lam Bruce Reznick
+	On commutators and invariant subspaces<sup>†</sup>	1981	M. D. Choi Cecelia Laurie Heydar Radjavi
+	Sums of squares in some integral domains	1980	M. D. Choi T. Y. Lam Bruce Reznick Alex Rosenberg
+ PDF Chat	The spectral mapping theorem for joint approximate point spectrum	1974	M. D. Choi Chandler Davis

Common Coauthors

Coauthor	Papers Together
Bruce Reznick	8
T. Y. Lam	7
Heydar Radjavi	4
A. Prestel	2
Peter Rosenthal	2
Cecelia Laurie	2
Don Hadwin	1
T. Andô	1
Eric Nordgren	1
Chandler Davis	1
T. Y. Lam	1
Alex Rosenberg	1
Ali Jafarian	1
Zhehao Dai	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+	Extremal positive semidefinite forms	1977	Man-Duen Choi T. Y. Lam	3
+ PDF Chat	Ueber die Darstellung definiter Formen als Summe von Formenquadraten	1888	David Hilbert	3
+	Über die Darstellung definiter Formen als Summe von Formenquadraten	1933	David Hilbert	3
+ PDF Chat	Linear Transformations on Algebras of Matrices: The Invariance of the Elementary Symmetric Functions	1959	Marvin Marcus Roger Purves	2
+	Real zeros of positive semidefinite forms. I	1980	Man Duen Choi Tsit Yuen Lam Bruce Reznick	2
+	Some concrete aspects of Hilbert’s 17th Problem	2000	Bruce Reznick	2
+	Eine Bemerkung zu den h�heren Pythagoraszahlen reeller K�rper	1988	Joachim Schmid	2
+	A Treatise on Plane and Advanced Trigonometry	2004	Ernest William Hobson	2
+	Ueber die Darstellung definiter Formen als Summen von Formenquadraten	1888	Hilbert	2
+	Zur Darstellung definiter Funktionen als Summe von Quadraten	1967	Albrecht Pfister	2
+	On totally positive units of real holomorphy rings	1994	Joachim Schmid	2
+	The real holomorphy ring and sums of 2n-th powers	1982	Eberhard Becker	2
+	Sums of fourth powers of real algebraic functions	1994	Joachim Schmid	2
+ PDF Chat	Lectures on Formally Real Fields	1984	Alexander Prestel	2
+	The lehmus inequality	1985	H. S. M. Coxeter	2
+	Positive definite functions on spheres	1942	I. J. Schoenberg	1
+ PDF Chat	Inversion of Toeplitz matrices	1959	Alberto P. Calderón Frank Spitzer Harold Widom	1
+	Case Distinctions are Necessary for Representing polynomials as Sums of Squares	1982	Charles N. Delzell	1
+ PDF Chat	Über ternäre definite Formen	1893	David Hilbert	1
+	Bemerkungen zur Theorie der beschränkten Bilinearformen mit unendlich vielen Veränderlichen.	1911	Joan Brodsky Schur	1
+ PDF Chat	On the Dimension of Modules and Algebras, VIII. Dimension of Tensor Products	1957	Samuel Eilenberg Alex Rosenberg Daniel Zelinsky	1
+	Functional Analysis and Semi-groups	1996	Einar Hille Robert A. Phillips	1
+	Commutativity-preserving operators on symmetric matrices	1984	Heydar Radjavi	1
+ PDF Chat	Positive Linear Maps of Operator Algebras	2012	Erling Størmer	1
+	On transitive and reductive operator algebras	1974	Heydar Radjavi Peter Rosenthal	1
+	Even symmetric sextics	1987	M. D. Choi T. Y. Lam Bruce Reznick	1
+	Some generators for the algebra of<i>n</i>×<i>n</i>matrices	1977	Fergus Gaines	1
+ PDF Chat	The joint spectrum of commuting nonnormal operators	1971	John W. Bunce	1
+	�ber die Stufe von Dedekind Ringen	1979	Ricardo Baeza	1
+	Algebraic Properties of Toeplitz operators.	1964	Paul R. Halmos Arlen Brown	1
+	Banach Algebra Techniques in Operator Theory	1998	Ronald G. Douglas	1
+	Éléments de mathématique	2006	Nicolás Bourbaki	1
+	An Introduction to Functional Analysis	2006	Angus E. Taylor P. J. Davis	1
+ PDF Chat	Positive functions on 𝐶*-algebras	1955	W. Forrest Stinespring	1
+	Algebraic and Analytic Aspects of Operator Algebras	1970	Irving Kaplansky	1
+ PDF Chat	The map of the Witt ring of a domain into the Witt ring of its field of fractions	1975	Thomas C. Craven Alex Rosenberg Roger Ware	1
+ PDF Chat	An introduction to real algebra	1984	T. Y. Lam	1
+ PDF Chat	Approximate proper vectors	1962	S. K. Berberian	1
+ PDF Chat	On the spectrum of a Toeplitz operator	1964	Harold Widom	1
+ PDF Chat	On the Jordan structure of 𝐶*-algebras	1965	Erling Størmer	1
+	A joint spectrum for several commuting operators	1970	Joseph L. Taylor	1
+	Simultaneous triangularization of matrices—low rank cases and the nonderogatory case	1978	Thomas J. Laffey	1
+	On sums of squares and on elliptic curves over function fields	1971	J. W. S. Cassels W. J. Ellison A. Pfister	1
+	General Theory of Banach Algebras.	1961	E. H. Batho C. E. Rickart	1
+ PDF Chat	An invariant subspace theorem	1975	John Daughtry	1
+	Sets of complex numbers associated with a matrix	1948	W. V. Parker	1
+	Linear transformations on symmetric matrices that preserve commutativity	1982	G. H. Chan M. H. Lim	1
+	Inequalities Between Sums of Powers	1959	H. D. Ursell	1
+	Linear transformations on matrices: The invariance of commuting pairs of matrices	1978	LeRoy B. Beasley	1
+ PDF Chat	Toeplitz operators on 𝐻² spaces	1964	Allen Devinatz	1