A Crime/S.I.R. optimal control problem

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Main Authors: Álvarez, Mariana, Alegría, Alexander, Rivera, Andrés, Pedersen, Sebastián
Format: Preprint
Published: 2025
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_version_ 1866911705913622528
author Álvarez, Mariana
Alegría, Alexander
Rivera, Andrés
Pedersen, Sebastián
author_facet Álvarez, Mariana
Alegría, Alexander
Rivera, Andrés
Pedersen, Sebastián
contents This paper presents and discusses a mathematical model inspired by control theory to derive optimal public policies for minimizing costs associated with the reduction and control of criminal activity in a population. Specifically, we analyze the optimal control problem \begin{equation*} \min G(u_1, u_2, u_3) = \int_{0}^{t_{\text{F}}} \left( I(t) - R(t) + \frac{B_1}{2} u_1^2(t) + \frac{B_2}{2} u_2^2(t) + \frac{B_3}{2} u_3^2(t) \right) \, dt. \end{equation*} where $I=I(t)$ and $R=R(t)$ satisfies the system of equations \begin{equation*} \left\{ \begin{aligned} \dot{S} &= Λ- (1-u_1)SI - μS + ((1+u_3)γ_2)I + ρΩR,\\ \dot{I} &= (1-u_1)SI - (μ+ δ_1)I - ((1+u_2)γ_1)I - ((1+u_3)γ_2)I + (1-Ω)ρR,\\ \dot{R} &= ((1+u_2)γ_1)I - (μ+ δ_2 + ρ)R. \end{aligned} \right. \end{equation*} Our approach assumes that the social and economic effects of criminal behavior can be modeled by a dynamic SIR-type system, which serves as a constraint on a cost functional associated with the strategies implemented by government and law enforcement authorities to reduce criminal behavior. Using optimal control theory, the proposed controls, i.e., preventive policies (such as community and social cohesion programs), are expected to have a significant and positive impact on crime reduction, generating opportunities for the most disadvantaged sectors of Cali society and contributing to long-term security. Given that resources to address this problem are limited, this research aims to determine an optimal combination of public interventions and policies that minimize criminality at the lowest possible economic cost, using an SIR model, tools from variational calculus, and optimal control theory.
format Preprint
id arxiv_https___arxiv_org_abs_2509_21406
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle A Crime/S.I.R. optimal control problem
Álvarez, Mariana
Alegría, Alexander
Rivera, Andrés
Pedersen, Sebastián
Systems and Control
92D30, 49J15, 34H05, 91F99, 34D20
This paper presents and discusses a mathematical model inspired by control theory to derive optimal public policies for minimizing costs associated with the reduction and control of criminal activity in a population. Specifically, we analyze the optimal control problem \begin{equation*} \min G(u_1, u_2, u_3) = \int_{0}^{t_{\text{F}}} \left( I(t) - R(t) + \frac{B_1}{2} u_1^2(t) + \frac{B_2}{2} u_2^2(t) + \frac{B_3}{2} u_3^2(t) \right) \, dt. \end{equation*} where $I=I(t)$ and $R=R(t)$ satisfies the system of equations \begin{equation*} \left\{ \begin{aligned} \dot{S} &= Λ- (1-u_1)SI - μS + ((1+u_3)γ_2)I + ρΩR,\\ \dot{I} &= (1-u_1)SI - (μ+ δ_1)I - ((1+u_2)γ_1)I - ((1+u_3)γ_2)I + (1-Ω)ρR,\\ \dot{R} &= ((1+u_2)γ_1)I - (μ+ δ_2 + ρ)R. \end{aligned} \right. \end{equation*} Our approach assumes that the social and economic effects of criminal behavior can be modeled by a dynamic SIR-type system, which serves as a constraint on a cost functional associated with the strategies implemented by government and law enforcement authorities to reduce criminal behavior. Using optimal control theory, the proposed controls, i.e., preventive policies (such as community and social cohesion programs), are expected to have a significant and positive impact on crime reduction, generating opportunities for the most disadvantaged sectors of Cali society and contributing to long-term security. Given that resources to address this problem are limited, this research aims to determine an optimal combination of public interventions and policies that minimize criminality at the lowest possible economic cost, using an SIR model, tools from variational calculus, and optimal control theory.
title A Crime/S.I.R. optimal control problem
topic Systems and Control
92D30, 49J15, 34H05, 91F99, 34D20
url https://arxiv.org/abs/2509.21406