The Schur algebra is not spectral in B(`2). Romain Tessera∗ July 31, 2009 Abstract We give an example of an infinite matrix whose rows and columns

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• Algebra
• Mathematics
• Group theory
• Geometric group theory
• Topological groups
• Functional analysis
• Amenable group
• Matrix
• Kazhdan's property
• Cayley graph
• Convolution
• Group cohomology

Classroom Voting Questions: Algebra Section 4.3 Solving Compound Inequalities 1. Which of the following is equivalent to 3 < x + 5 < 9? (a) 3 < x < 4 (b) −2 < x < 9

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On unitary representations of the Virasoro algebra* The Virasoro algebra b is an infinite-dimensional Lie algebra with basis Lm , m  Z, and Z and defining relations: (i) [Lm , Ln ] = (m − n)Lm+n +

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Classroom Voting Questions: Algebra Section 4.2 Solving Linear Inequalities Using the Multiplication - Division Principle 1. True or False: If −x < 0 then x < 0. (a) True, and I am very confident (b) True, but I am no

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MathQuest: Linear Algebra Affine and Convex Combinations 1. How do you describe the set of all affine combinations of the vectors (1, 0) and (0, 1)? (a) A point (b) A line segment

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American Computer Science League Flyer Solutions 1. Boolean Algebra ( A  B) ( AB  BC ) = A B ( AB  BC ) = AA B  A BB C  0  0  0

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Algebra e logica. 8. Reticoli bis. Roma, 4 dicembreQuali dei seguenti insiemi parzialmente ordinati sono reticoli e quali no: a _? b ~>

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Classroom Voting Questions: Algebra Section 5.6 Special Products of Binomials 1. What is (3x − 5)2 ? (a) 9x2 − 25 (b) 9x2 − 15x − 25

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Algebra e Logica Esercizi 3. Relazioni. Roma, 10 ottobreSiano dati gli insiemi A = {1, 2, 3, 4} e B = {11, 12, 13, 14, 15, 16, 17} e sia data la relazione R = {(1, 11), (1, 13), (1, 15), (2, 12), (2, 13), (3, 1

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Algebra II 9. Campi. Roma, 9 dicembreDeterminare il grado del campo di spezzamento dei seguenti polinomi su Q: (a) X 3 − 1; (b) X 3 − 3; (c) X 4 − 2;

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