LOCAL EXISTENCE AND UNIQUENESS OF SOLUTIONS TO A PDE MODEL FOR CRIMINAL BEHAVIOR

2010 ◽  
Vol 20 (supp01) ◽  
pp. 1425-1457 ◽  
Author(s):  
NANCY RODRIGUEZ ◽  
ANDREA BERTOZZI
Keyword(s):  
Existence And Uniqueness ◽  
Criminal Behavior ◽  
Blow Up ◽  
Local Existence ◽  
Coupled System ◽  
Qualitative Behavior ◽  
Residential Burglary ◽  
Uniqueness Of Solutions ◽  
Pde Model ◽  
Local Existence And Uniqueness

The analysis of criminal behavior with mathematical tools is a fairly new idea, but one which can be used to obtain insight on the dynamics of crime. In a recent work,34 Short et al. developed an agent-based stochastic model for the dynamics of residential burglaries. This model produces the right qualitative behavior, that is, the existence of spatio-temporal collections of criminal activities or "hotspots", which have been observed in residential burglary data. In this paper, we prove local existence and uniqueness of solutions to the continuum version of this model, a coupled system of partial differential equations, as well as a continuation argument. Furthermore, we compare this PDE model with a generalized version of the Keller–Segel model for chemotaxis as a first step to understanding possible conditions for global existence versus blow-up of the solutions in finite time.

scholarly journals On a system of nonlinear pseudoparabolic equations with Robin-Dirichlet boundary conditions

2021 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
Le Thi Phuong Ngoc ◽  
Khong Thi Thao Uyen ◽  
Nguyen Huu Nhan ◽  
Nguyen Thanh Long
Keyword(s):  
Weak Solution ◽  
Lower Bound ◽  
Existence And Uniqueness ◽  
Dirichlet Boundary ◽  
Blow Up ◽  
Local Existence ◽  
Initial Energy ◽  
Dirichlet Boundary Conditions ◽  
Local Existence And Uniqueness ◽  
Pseudoparabolic Equations

<p style='text-indent:20px;'>In this paper, we investigate a system of pseudoparabolic equations with Robin-Dirichlet conditions. First, the local existence and uniqueness of a weak solution are established by applying the Faedo-Galerkin method. Next, for suitable initial datum, we obtain the global existence and decay of weak solutions. Finally, using concavity method, we prove blow-up results for solutions when the initial energy is nonnegative or negative, then we establish here the lifespan for the equations via finding the upper bound and the lower bound for the blow-up times.</p>

LOCAL EXISTENCE AND UNIQUENESS THEORY FOR THE SECOND SOUND EQUATION IN ONE SPACE DIMENSION

2012 ◽  
Vol 09 (01) ◽  
pp. 177-193 ◽  
Author(s):  
KEIICHI KATO ◽  
YUUSUKE SUGIYAMA
Keyword(s):  
Cauchy Problem ◽  
Existence And Uniqueness ◽  
Space Dimension ◽  
Local Existence ◽  
Second Sound ◽  
Uniqueness Of Solutions ◽  
Local Existence And Uniqueness ◽  
The Cauchy Problem ◽  
Time Existence ◽  
Uniqueness Theory

We study the local-in-time existence and uniqueness of the Cauchy problem for the nonlinear wave equation [Formula: see text], which is called the second sound equation. Assuming that u(0, x) = φ ≥ A > 0, φ ∈ C1, and ∂xφ ∈ Hs, we establish the uniqueness of solutions without restriction on their amplitude.

scholarly journals Local existence and blow-up criterion of Hölder continuous solutions of the Boussinesq equations

1999 ◽  
Vol 155 ◽  
pp. 55-80 ◽  
Author(s):  
Dongho Chae ◽  
Sung-Ki Kim ◽  
Hee-Seok Nam
Keyword(s):  
Existence And Uniqueness ◽  
Blow Up ◽  
Local Existence ◽  
Boussinesq Equations ◽  
Passive Scalar ◽  
Continuous Solutions ◽  
Hölder Continuous ◽  
Local Existence And Uniqueness ◽  
Local Solutions ◽  
Blow Up Criterion

AbstractIn this paper we prove the local existence and uniqueness of C1+γ solutions of the Boussinesq equations with initial data υ0, θ0 ∈ C1+γ, ω0, ∇θ0 ∈ Lq for 0 < γ < 1 and 1 < q < 2. We also obtain a blow-up criterion for this local solutions. More precisely we show that the gradient of the passive scalar θ controls the breakdown of C1+γ solutions of the Boussinesq equations.

scholarly journals The Burgers’ equation with stochastic transport: shock formation, local and global existence of smooth solutions

2019 ◽  
Vol 26 (6) ◽  
Author(s):  
Diego Alonso-Orán ◽  
Aythami Bethencourt de León ◽  
So Takao
Keyword(s):  
Global Existence ◽  
Existence And Uniqueness ◽  
Stochastic Equation ◽  
Burgers Equation ◽  
Blow Up ◽  
Local Existence ◽  
Smooth Solutions ◽  
Local Existence And Uniqueness ◽  
Stochastic Transport ◽  
Global Existence And Uniqueness

Abstract In this work, we examine the solution properties of the Burgers’ equation with stochastic transport. First, we prove results on the formation of shocks in the stochastic equation and then obtain a stochastic Rankine–Hugoniot condition that the shocks satisfy. Next, we establish the local existence and uniqueness of smooth solutions in the inviscid case and construct a blow-up criterion. Finally, in the viscous case, we prove global existence and uniqueness of smooth solutions.

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