Homology Classes of the Circle Space on Spheres
and the Discontinuity of Deformations. . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Congyi Zhou, Yiming Long

Existence of Multiple Positive Solutions for
N-Laplacian in a Bounded Domain in RN. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
S. Prashanth, K. Sreenadh

Semilinear Integrodifferential Problems
With Non-Symmetric Kernels
Via Mountain-Pass Techniques . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Silvia Mataloni, Michele Matzeu

Precise Asymptotic Properties of Solutions
to Two-Parameter Elliptic Eigenvalue
Problems in a Ball . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Tetsutaro Shibata

Necessary and Sufficient Conditions
for Extinction of One Species. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Antonio Tineo

Existence and Multiplicity of Solution
for a Class of Quasilinear Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Claudianor O. Alves

Symmetrization and Mass Comparison
for Degenerate Nonlinear Parabolic
and Related Elliptic Equations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Juan Luis Vázquez




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