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Discrete and Continuous Dynamical Systems - Series A (DCDS-A)
 

Volume 17,Number 2,     February 2007

1

Preface   Pages : i - ii

Daniel Smania,  Ali Tahzibi and Marcelo Viana

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2

Pseudo-orbit shadowing in the $C^1$ topology   Pages : 223 - 245

Flavio Abdenur and Lorenzo J. Díaz

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3

Hopf bifurcation at infinity for planar vector fields   Pages : 247 - 258

Begoña Alarcón,  Víctor Guíñez and Carlos Gutierrez

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4

Nonexistence of limit cycles for a class of structurally stable quadratic vector fields   Pages : 259 - 270

J. C. Artés,  Jaume Llibre and J. C. Medrado

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5

Sub-actions and maximizing measures for one-dimensional transformations with a critical point   Pages : 271 - 280

Flávia M. Branco

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6

Hartman-Grobman theorems along hyperbolic stationary trajectories   Pages : 281 - 292

Edson A. Coayla-Teran,  Salah-Eldin A. Mohammed and Paulo Régis C. Ruffino

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7

Codimension two umbilic points on surfaces immersed in $R^3$   Pages : 293 - 308

Jorge Sotomayor and Ronaldo Garcia

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8

Local and global phase portrait of equation $\dot z=f(z)$   Pages : 309 - 329

Antonio Garijo,  Armengol Gasull and Xavier Jarque

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9

On periodic orbits of polynomial relay systems   Pages : 331 - 347

Alain Jacquemard and Weber Flávio Pereira

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10

Geometric properties of the integral curves of an implicit differential equation   Pages : 349 - 364

Farid Tari

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11

A simple computable criteria for the existence of horseshoes   Pages : 365 - 370

Salvador Addas-Zanata

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12

Semicontinuity of entropy, existence of equilibrium states and continuity of physical measures   Pages : 371 - 386

Vítor Araújo

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13

Polynomial inverse integrating factors for polynomial vector fields   Pages : 387 - 395

Antoni Ferragut,  Jaume Llibre and Adam Mahdi

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14

A remark on an eigenvalue condition for the global injectivity of differentiable maps of $R^2$   Pages : 397 - 402

Carlos Gutierrez and Nguyen Van Chau

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15

Cohomology and subcohomology problems for expansive, non Anosov geodesic flows   Pages : 403 - 422

Artur O. Lopes,  Vladimir A. Rosas and Rafael O. Ruggiero

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16

On the Burnside problem in Diff(M)   Pages : 423 - 439

Julio C. Rebelo and Ana L. Silva

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17

Putting a boundary to the space of Liénard equations   Pages : 441 - 448

Robert Roussarie

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