Mathematical Research Letters

Volume 1, Issue 2, March 1994

Rigidity and Dynamics Around Manifolds of Negative Curvature
Chengbo Yue
Math. Research Letters pp. 123-147
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Cohen-Macaulayness in graded algebras
Joseph Lipman
Math. Research Letters pp. 149-157
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The first eigenvalue of analytic level surfaces on spheres
Sagun Chanillo
Math. Research Letters pp. 159-166
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Van Kampen's embedding Obstruction is incomplete for $2$-Complexes in $\rz^{4}$
Michael H. Freedman, Vyacheslav S. Krushkal, and Peter Teichner
Math. Research Letters pp. 167-176
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A Sobolev Inequality and Neumann Heat Kernel Estimate for Unbounded Domains
Z. Q. Chen, R. J. Williams, and Z. Zhao
Math. Research Letters pp. 177-184
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An algebra of pseudodifferential operators
Johannes Sjöstrand
Math. Research Letters pp. 185-192
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Subelliptic Estimates of Polynomial Differential Operators and Applications to Rigidity of Abelian Actions
A. Katok and R. J. Spatzier
Math. Research Letters pp. 193-202
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On a Class of Spherical Harmonics Associated with Rigid Body Motion
John A. Toth
Math. Research Letters pp. 203-210
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Global and Unique Weak Solutions of Nonlinear Wave Equations
Lev Kapitanski
Math. Research Letters pp. 211-223
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Commutative algebra in stable homotopy theory and a completion theorem
A. D. Elmendorf, J. P. C. Greenlees, I. Kriz, and J. P. May
Math. Research Letters pp. 225-239
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A Necessary Condition For Analytic Hypoellipticity
Michael Christ
Math. Research Letters pp. 241-248
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Mapping Class Groups are Automatic
Lee Mosher
Math. Research Letters pp. 249-255
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Möbius Cone Structures on 3-Dimensional Manifolds
Feng Luo
Math. Research Letters pp. 257-261
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An isoperimetric inequality and the geometric Sobolev embedding for vector fields
Luca Capogna, Donatella Danielli, and Nicola Garofalo
Math. Research Letters pp. 263-268
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A mathematical theory of quantum cohomology
Yongbin Ruan and Gang Tian
Math. Research Letters pp. 269-278
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