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Mathematics Preprints

2009

Pre-2009-014, Existence and bounds of positive solutions
by Benedetta Noris, Miguel Ramos.
LaTex PDF
Pre-2009-013, Will it always be necessary taking into account sample selection?
by João Gomes, Tiago Oliveira.
LaTex PDF
Pre-2009-012, VANISHING VISCOSITY WITH SHORT WAVE LONG WAVE INTERACTIONS FOR MULTI-D SCALAR CONSERVATION LAWS
by João-Paulo Dias, Mário Figueira, Hermano Frid.
LaTex, PDF
Pre-2009-011, One - Phase Parabolic Free Boundary Problem in Convex Ring
by Michael Poghosyan, Rafayel Teymurazyan.
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Pre-2009-010, A distributional approach to the geometry of 2D dislocations at the mesoscale. Part B: The case of a countable family of dislocations
by Nicolas Van Goethem, François Dupret.
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Pre-2009-009, A distributional approach to the geometry of 2D dislocations at the mesoscale. Part A: General theory and Volterra dislocations
by Nicolas Van Goethem, François Dupret.
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Pre-2009-008, Crack nucleation sensitivity analysis
by Nicolas Van Goethem, Antonio André Novotny.
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Pre-2009-007, ON THE BLOW-UP OF SOLUTIONS TO ANISOTROPIC PARABOLIC EQUATIONS WITH VARIABLE NONLINEARITY
by S.N. Antontsev, S. Shmarev.
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Pre-2009-006, On the influence of an absorption term in incompressible fluid flows
by Hermenegildo Borges de Oliveira.
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Pre-2009-005, Existence of bound states for the coupled Schrodinger-KdV system with cubic nonlinearity
by João-Paulo Dias, Mário Figueira, Filipe Oliveira.
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Pre-2009-004, Boundedness and Global Exponential Stability for Delayed Differential Equations with Applications
by Teresa Faria, José J. Oliveira.
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Pre-2009-003, Sharp Conditions for Global Stability of Lotka-Volterra Systems with Distributed Delays
by Teresa Faria.
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Pre-2009-002, BLOW-UP OF SOLUTIONS TO PARABOLIC EQUATIONS WITH NONSTANDARD GROWTH CONDITIONS
by S.N. Antontsev, S. Shmarev.
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Pre-2009-001, Torus bifurcations, isolas and chaotic attractors in a simple dengue fever model with ADE and temporary cross immunity
by Maíra Aguiar, Nico Stollenwerk, Bob Kooi.
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2008

Pre-2008-023, Remarks on a second order non-autonomous problem on the half-line
by Ricardo Enguiça, Luís Sanchez.
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Pre-2008-022, THE NONLINEAR N-MEMBRANES EVOLUTION PROBLEM
by José Francisco Rodrigues, Lisa Santos, José Miguel Urbano.
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Pre-2008-021, Vanishing Solutions of Anisotropic Parabolic Equations With Variable Nonlinearity
by S.N. Antontsev, S. Shmarev.
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Pre-2008-020, Cycles and universality in sunspot numbers fluctuations
by R. Gonçalves, A. A. Pinto, Nico Stollenwerk.
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Pre-2008-019, A scaling analysis in the SIRI epidemiological model
by José Martins, Alberto Pinto, Nico Stollenwerk.
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Pre-2008-018, Epidemiology of dengue fever: A model with temporary cross-immunity and possible secondary infection shows bifurcations and chaotic behaviour in wide parameter regions
by Maíra Aguiar, Bob Kooi, Nico Stollenwerk.
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Pre-2008-017, Shape and Topology Optimization for Periodic Problems - Part II: Optimization algorithm and numerical examples
by Cristian Barbarosie, Anca-Maria Toader.
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Pre-2008-016, Shape and Topology Optimization for Periodic Problems - Part I: The shape and the topological derivative
by Cristian Barbarosie, Anca-Maria Toader.
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Pre-2008-015, Uniform Holder bounds for nonlinear Schrodinger systems with strong competition
by Benedetta Noris, Hugo Tavares, Susanna Terracini, Gianmaria Verzini.
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Pre-2008-014, Invariant connections on Euclidean space
by R. Albuquerque, Luisa Consiglieri.
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Pre-2008-013, The non-incompressibility on heat-conducting fluids. The stationary case.
by Luisa Consiglieri.
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Pre-2008-012, On the Stationary Oseen Equations in R^3
by C. Amrouche, Luisa Consiglieri.
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Pre-2008-011, The (p - q) Coupled Fluid-Energy Systems
by Luisa Consiglieri.
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Pre-2008-010, Regularity for the Navier-Stokes-Fourier System
by Luisa Consiglieri.
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Pre-2008-009, Heteroclinics for non-autonomous second order differential equations
by A. Gavioli, L. Sanchez.
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Pre-2008-008, Computational bounds on polynomial differential equations
by Daniel S. Graça, Jorge Buescu, Manuel L. Campagnolo.
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Pre-2008-007, Localized solutions of anisotropic parabolic equations
by S.N. Antontsev, S. Shmarev.
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Pre-2008-006, Qualitative properties of the ice-thickness in a 3D model
by S.N. Antontsev, H.B. de Oliveira.
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Pre-2008-005, Perturbation from symmetry for indefinite semilinear elliptic equations
by Miguel Ramos, Hossein Tehrani.
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Pre-2008-004, Generalized Shear Thinning Models, and Regularity
by H. Beirão da Veiga.
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Pre-2008-003, Turbulence Models, p-Fluid Flows, and W^2,l Regularity of Solutions
by H. Beirão da Veiga.
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Pre-2008-002, Recursion schemata for NC^k
by Guillaume Bonfante, Reinhard Kahle, Jean-Yves Marion, Isabel Oitavem.
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Pre-2008-001, The obstacle problem for nonlinear elliptic equations with variable growth and L^1data
by José Francisco Rodrigues, Manel Sanchón, José Miguel Urbano.
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2007

Pre-2007-025, On Non-Newtonian p-Fluids. The Pseudo-Plastic Case
by H. Beirão da Veiga.
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Pre-2007-024, On a constrained reaction-diffusion system related to multiphase problems
by José Francisco Rodrigues, Lisa Santos.
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Pre-2007-023, Local and Global Stability for Lotka-Volterra Systems with Distributed Delays and Instantaneous Negative Feedbacks
by Teresa Faria, José J. Oliveira.
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Pre-2007-022, Vanishing Viscosity with Short Wave Long Wave Interactions for Systems of Conservation Laws
by João-Paulo Dias, Mário Figueira, Hermano Frid.
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Pre-2007-021, Nodal non-radially symmetric solutions to Emden-Fowler equations
by Miguel Ramos, Wenming Zou.
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Pre-2007-020, Multiple critical points of perturbed symmetric strongly indefinite functionals
by Denis Bonheure, Miguel Ramos.
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Pre-2007-019, Nodal solutions for perturbed symmetric elliptic equations via Morse index estimates
by Miguel Ramos, Wenming Zou.
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Pre-2007-018, A priori bounds via the relative Morse index of solutions of an elliptic system
by Miguel Ramos.
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Pre-2007-017, A note on existence and localization of solutions for certain fourth order boundary value problems
by Ricardo Enguiça, Luís Sanchez.
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Pre-2007-016, Abundance of elliptic dynamics on conservative 3-flows
by Mário Bessa, P. Duarte.
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Pre-2007-015, Spectral stability of Markov systems
by P. Duarte, M. J. Torres.
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Pre-2007-014, Slip boundary effects on unsteady flows of incompressible viscous heat conducting fluids with a non-linear internal energy-temperature relationship
by Miroslav Bulícek, Luisa Consiglieri, Josef Málek.
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Pre-2007-013, Anisotropic Parabolic Equations with Variable Nonlinearity
by S. Antontsev, S. Shmarev.
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Pre-2007-012, The Joule-Thomson Effect on the Thermoelectric Conductors
by Luisa Consiglieri.
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Pre-2007-011, The Abstract Immune System Algorithm
by José Pacheco, José Félix Costa.
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Pre-2007-010, The Euclid Abstract Machine
by Jerzy Mycka, José Félix Costa, Francisco Coelho.
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Pre-2007-009, Existence of local strong solutions for a quasilinear Benney system
by João-Paulo Dias, Mário Figueira, Filipe Oliveira.
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Pre-2007-008, A Functional Characterisation of the Analytical Hierarchy
by Bruno Loff.
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Pre-2007-007, The New Promise of Analog Computation
by José Félix Costa, Bruno Loff, Jerzy Mycka.
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Pre-2007-006, Hybrid Finite Computation
by Luís Mendes Gomes, José Félix Costa.
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Pre-2007-005, Five views of Hypercomputation
by Bruno Loff, José Félix Costa.
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Pre-2007-004, A splitting theorem for Kahler Submanifolds of a Space-forms
by M. J. Ferreira.
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Pre-2007-003, Study of the cost functional for free material design problems
by Cristian Barbarosie, Sérgio Lopes.
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Pre-2007-002, Solutions with Multiple Spike Patterns for an Elliptic System
by Miguel Ramos, Hugo Tavares.
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Pre-2007-001, Saint Venant's Principle and its Connections to Topology Optimization
by Cristian Barbarosie, Anca-Maria Toader.
LaTeX, PDF

2006

Pre-2006-041, On the Ladyzhenskaya-Smagorinsky Turbulence Model of the Navier-Stokes Equations. Regularity up to the Boundary
by H. Beirão da Veiga.
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Pre-2006-040, A Note on the Global Integrability, for any Finite Power, of the Full Gradient for a Class of Power Law Models, p<2
by H. Beirão da Veiga.
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Pre-2006-039, Remarks on the Navier-Stokes Evolution Equations under Slip Type Boundary Conditions with Linear Friction?
by H. Beirão da Veiga.
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Pre-2006-038, Navier-Stokes Equations with Shear Dependent Viscosity.Regularity up to the Boundary
by H. Beirão da Veiga.
LaTeX, PDF
Pre-2006-037, Dynamics Along the Edges of Simple Polyhedrons
by Pedro Duarte.
LaTeX, PDF
Pre-2006-036, On the Nullity of Isometric Immersions from Kahler Manifolds
by M.J. Ferreira, R. Tribuzy.
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Pre-2006-035, A Characterization of the Standard Embedding of CP^2
by J.-H. Eschenburg, M.J. Ferreira, R. Tribuzy.
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Pre-2006-034, Multiplicity of Solutions for Asymptotically Linear n-th Order Boundary Value Problems
by Francesca Dalbono.
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Pre-2006-033, An analytical solution for the ionic flux in an axonial membrane model
by Luisa Consiglieri, Ana Rute Domingos.
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Pre-2006-032, Computability on Reals, Infinite Limits and Differential Equations
by Bruno Loff, José Félix Costa, Jerzy Mycka.
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Pre-2006-031, Isotropic ppmc immersions
by J.-H. Eschenburg, M.J. Ferreira, R. Tribuzy.
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Pre-2006-030, Navier-Stokes equations with absorption under slip boundary conditions:
existence, uniqueness and extinction in time
by S. N. Antontsev, H. B. de Oliveira.
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Pre-2006-029, Physics and Computation
by José Félix Costa.
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Pre-2006-028, Note on the solution of a differential equation
by José Félix Costa, Bruno Loff.
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Pre-2006-027, Processes with Local and Global Liveness Requirements
by Hélia Guerra, José Félix Costa.
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Pre-2006-026, The Euclid Abstract Machine
by Jerzy Mycka, Francisco Coelho, José Félix Costa.
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Pre-2006-025, Undecidability Over Continuous-time
by Jerzy Mycka, José Félix Costa.
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Pre-2006-024, An analytic condition for P c NP
by José Félix Costa, Jerzy Mycka.
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Pre-2006-023, A new conceptual framework for analog computation
by Jerzy Mycka, José Félix Costa.
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Pre-2006-022, Elliptic Isles in Families of Area Preserving Maps
by P. Duarte,
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Pre-2006-021, Pearson's Idea to test fitting in GLM
by João F. Gomes,
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Pre-2006-020, Sufficient conditions for the convexity of the level sets of ground-state solutions
by J. M. Gomes,
LaTeX, PDF
Pre-2006-019, Existence and L_\infty estimates of some mountain pass type solutions
by J. M. Gomes,
LaTeX, PDF
Pre-2006-018, Nonlocal maximum principles and applications
by Ricardo Enguiça, Luís Sanchez.
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Pre-2006-017, Existence of weak solutions for a quasilinear version of Benney equations
by João-Paulo Dias, Mário Figueira.
LaTeX, PDF,
Pre-2006-016, Friction boundary conditions on thermal incompressible viscous flows
by Luisa Consiglieri.
LaTeX, PDF,
Pre-2006-015, A (p - q) coupled system in elliptic nonlinear problems with nonstandard boundary conditionsp
by Luisa Consiglieri.
LaTeX, PDF
Pre-2006-014, Multiplicity of solutions of Dirichlet problems associated to second order equations in R^2
by Carlota Rebelo, Francesca Dalbono.
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Pre-2006-013, Global Attractivity for Scalar Differential Equations with Small Delay
by Teresa Faria, José J. Oliveira.
LaTeX, PDF
Pre-2006-012, Positive heteroclinics and traveling waves for scalar population models with a single delay
by Teresa Faria, Sergei Tromchuk.
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Pre-2006-011, Non-monotone travelling waves in a single species reaction-diusion equation with delay
by Teresa Faria, Sergei Tromchuk.
LaTeX, PDF
Pre-2006-010, Steady-state thermal viscous incompressible flows with frictional and radiative effects
by Luisa Consiglieri
LaTeX, PDF
Pre-2006-009, Radial Solutions for a Nonlocal Boundary Value Problem
by Ricardo Enguiça, Luís Sanchez.
LaTeX, PDF
Pre-2006-008, On a Class of Bounded Trajectories for some Non-Autonomous Systemss
by A. Gavioli, Luís Sanchez.
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Pre-2006-007, Positivity and Lower and Upper Solutions for Fourth Order Boundary Value Problems
by Alberto Cabada, J. Ángel Cid, Luís Sanchez.
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Pre-2006-006, On The Curvarture and Torsion Effects in One Dimensional Waveguides
by Guy Bouchitté, M. Luísa Mascarenhas, Luís Trabucho.
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Pre-2006-005, A Conditional Gaussian Martingale Algorithm for Global Optimization
by Manuel L. Esquível.
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Pre-2006-004, WKB Analysis for Nonlinear Schrodinger Equations with Potential
by Rémi Carles.
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Pre-2006-003, Traveling Waves for Delayed Reaction-Diffusion Equations with Global Response
by Teresa Faria, Wenzhang Huang, Jianhong Wu.
LaTeX, PDF
Pre-2006-002, Asymptotic Stability for Delayed Logistic Type Equations
by Teresa Faria.
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Pre-2006-001, The P =/ NP Conjecture in the Context of Real and Complex Analysis
by Jerzy Mycka, José Félix Costa.
LaTeX, PDF

2005

Pre-2005-009, The N-membranes problem with Neumann type boundary condition
by Lisa Santos, José F. Rodrigues, A. Azevedo.
LaTeX,   PDF

Pre-2005-008, Steady-state Bingham flow with temperature dependent nonlocal parameters and friction
by Luisa Consiglieri, José F. Rodrigues.
LaTeX,   PDF

Pre-2005-007, The Evolution of Norms
by Fabio Chalub, F.Santos, J.M. Pacheco.
LaTeX,   PDF

Pre-2005-006, Model Hierarchies for Cell Aggregation by Chemotaxis
by Fabio Chalub, Y. Dolak, P. Markowich, D. Oelz, C. Schmeiser, A.Soreff.
LaTeX,   PDF

Pre-2005-005, A short description of kinetic models for chemotax
by Fabio Chalub, José F. Rodrigues.
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Pre-2005-004, On instability of equilibrium figures of rotating viscous incompressible liquid
by Vsevolod Solonnikov.
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Pre-2005-003, Cascade of Phase Shifts for Nonlinear Schrödinger Equations
by Rémi Carles.
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Pre-2005-002, Global convergence of a Kinetic model for chemotaxis to a pertubed Keller-Segal model
by Fabio Chalub, Kyungkeun Kang.
LaTeX,   PDF

Pre-2005-001, The attractor of an equation of Tricomi's type
by Rogério Martins.
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2004

Pre-2004-028, On a Generalized Yorke Condition for Scalar Delayed Population Models
by Teresa Faria, Eduardo Liz, José J. Oliveira, Sergei Trofimchuk.
LaTeX,   PDF

Pre-2004-027, Special Solutions for Linear Functional Differential Equations and Asymptotic Behaviour
by Teresa Faria, Wenzhang Huang.
LaTeX,   PDF

Pre-2004-026, On Non-Newtonian Incompressible Fluids with Phase Transitions
by Luisa Consiglieri, Namkwon Kim, José Francisco Rodrigues.
LaTeX,   PDF

Pre-2004-025, Remarks on the two and three membranes problem
by Assis Azevedo, José Francisco Rodrigues, Lisa Santos.
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Pre-2004-024, Huygens' Principle for Hyperbolic Operators and Integrable Hierarchies
by Fabio Chalub, Jorge P. Zubelli.
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Pre-2004-023, Direction of vorticity and regularity for solutions to the evolution Navier-Stokes equations under the Navier boundary condition
by H. Beirão da Veiga.
LaTeX,   PDF

Pre-2004-022, On the viscous Cauchy problem and the existence of shock profiles for a p-sistem with a discontinuos stress function
by João Paulo Dias, Mário Figueira.
LaTeX,   PDF

Pre-2004-021, On Time-Periodic Solutions of the Navier-Stokes Equations in Unbounded Cylindrical Domains. Leray´s Problem for Periodic Flows
by H. Beirão da Veiga.
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Pre-2004-020, Probability Generating Functions for Discrete Real Valued Random Variables
by Manuel L.Esquível.
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Pre-2004-019, A Condicional Gaussian Martingale Algorithm for Global Optimization
by Manuel L.Esquível.
LaTeX,   PDF

Pre-2004-018, A variational approach to some boundary value problems in the half-line
by J. M. Gomes, L. Sanchez.
LaTeX,   PDF

Pre-2004-017, Existence and L infinity estimates for a class of singular ordinary diferential
by J. M. Gomes,
LaTeX,   PDF

Pre-2004-016, Least Squares Estimator Convergence and Error Collapse in Linear Models
by João Tiago Mexia, Pedro Corte Real, Manuel L. Esquível, João Lita da Silva.
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Pre-2004-015, On the Asymptotic Behavior of the Second Moment of the Fourier Transform of a Random Measure
by Manuel L.Esquível.
LaTeX,   PDF

Pre-2004-014, Fair Marking of Multiple Choise Tests
by Manuel L.Esquível.
LaTeX,   PDF

Pre-2004-013, Spatiotemporal Models in the Estimation of Area Precipitation
by Teresa Alpuim.
LaTeX,   PDF

Pre-2004-012, One-dimensional attractor for a dissipative system with a cylindrical phase space
by Rogério Martins.
LaTeX,   PDF

Pre-2004-011, Dynamical Value-at-Risk via Ito line integrals
by Manuel L.Esquível, Luís Manuel Dimas, Carlos Antunes Veiga.
LaTeX,   PDF

Pre-2004-010, Strong convergence of estimators, sub-exponential errors and collapse of radial and related errors
by João Tiago Mexia, Pedro Corte Real, Manuel L. Esquível, João Lita da Silva.
LaTeX,   PDF

Pre-2004-009, On the approximation of the solutions of the Riemann problem for a discontinuous conservation law
by João Paulo Dias, Mário Figueira.
LaTeX,   PDF

Pre-2004-008, Kinetic Models for Chemotaxis with Thershold
by Fabio Chalub, José Francisco Rodrigues.
LaTeX,   PDF

Pre-2004-007, Combinatorial Stability of Nondeterministic Systems
by P. Duarte, M.J. Torres.
LaTeX,   PDF

Pre-2004-006, Rate of convergence for correctors in almost periodic homogenization
by Andriy Bondarenko, Guy Bouchitté Luísa Mascarenhas, Rajesh Mahadevan.
LaTeX,   PDF

Pre-2004-005, The effect of inversely unstable solutions on the attractor of the forced pendulum equation with friction
by Rogério Martins.
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Pre-2004-004, Existence for a class of non-Newtonian fluids with a nonlocal friction boundary condition
by L. Consiglieri.
LaTeX,   PDF

Pre-2004-003, On the Efficiency of Regression Analsysis with AR(p) Errors
by Teresa Alpuim. Abdel El-Shaarawi.
LaTeX,   PDF

Pre-2004-002, Bounds for non periodic mixtures of infinitely many materials
by Cristian Barbarosie, Anca-Maria Toader.
LaTeX,   PDF

Pre-2004-001, Radially symmetric weak solutions for a quasilinear wave equation in two space dimensions
by João Paulo Dias, Hermano Frid.
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