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Properties of a System of Diophantine Equations with Implications for Real-World Constrained Branching Processes

Received: 25 October 2025     Accepted: 13 November 2025     Published: 27 December 2025
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Abstract

We consider an iterative branching process in which an abstract object can subdivide into other objects. The multiplication process may be varied by the occurrence of random "fatal" events in which some of the subsequent objects or states may fail. The process is also constrained to terminate upon reaching a given number of events or alternatively upon reaching a fixed number of iteration steps. A system of diophantine integer-variable equations capable of describing the aforementioned process is proposed. These equations can be applied prospectively to many branching phenomena of physical, biological and demographic nature. The equations, which we call systems of equations S, Q, U can be reformulated into three main classes based on the behavior of the sum of variables with respect to a fixed principal numerical parameter (TC= 'Total Cases'). These systems always admit solutions and these are sought for the three classes. The mathematical properties of the three systems are presented both analytically and graphically, and the software script for calculating numerical solutions is attached. In the case of high TC values, where direct calculation is not possible, special solutions are also sought for the steady state case and the "most probable" case, the latter using statistical mechanics methods. Solutions examples are given for a wide range of TC parameters. We also refer to real-world examples of applications ranging from prey/predator population dynamics to population mortality modeling and 2d lattice space tiling and also tree leaves branching alternatives. The main purpose of the study here proposed is to implement a mathematical frame that can provide tools to be used in the study of real-world applications.

Published in Science Journal of Applied Mathematics and Statistics (Volume 13, Issue 5)
DOI 10.11648/j.sjams.20251305.12
Page(s) 111-127
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2025. Published by Science Publishing Group

Keywords

Diophantine Equations, Binary Choices, Statistical Mechanics, Volterra-Lotka Equations, Demographic Mortality, 2d Lattice Partitions, Tree Leaves Branching

References
[1] M. Kimmel, D.E. Axelrod. "Branching processes in Biology", Springer, 2002.
[2] S. Méléard, "Modèles aléatoires en Ecologie et Evolution", Springer, 2016.
[3] N. Bacaer, "Histoires des mathematiques et de populations", ed. Cassini, Paris, 2008.
[4] J. Kaandorp, "Fractal modelling growth and form in biology", Springer-Verlag, 1994.
[5] A. Vulpiani, " Determinismo e caos", Carocci, 2004.
[6] G. Alberti "Fermi statistics method applied to model macroscopic demographic data"
[7] G. Alberti, Web site managed by the author and devoted to diophantine STC equation systems.
[8] L. A. Gavrilov and N. S. Gavrilova, "The Reliability Theory of Aging and Longevity" J. theor. Biol. (2001) 213, 527-545.
[9] P. Y. Nielsen, M. K Jensen, N. Mitarai, S. Bhatt "The Gompertz Law emerges naturally from the inter-dependencies between sub-components in complex organisms"
[10] G. Alberti "A conjecture on demographic mortality at high ages."
[11] G. Alberti "More on the mortality conjecture: the components of demographic mortality"
[12] G. Alberti "On two asymptotic limits for demographic mortality Life Tables data"
[13] G. C.Perosino, P. Zaccara "ATLANTE DELLE FOGLIE E DELLE 50 SPECIE ARBOREE PIÙ DIFFUSE NELL'ITALIA SETTENTRIONALE CONTINENTALE"-CREST HYPERLINK "
[14] J. W. Fink, M. Manhart "How do microbes grow in nature? The role of population dynamics in microbial ecology and evolution",
[15] H. Laurie "A class of models that support a maximum entropy principle for age structure",
[16] E. Nocerino "Emergent properties and the multiscale characterization challenge in condensed matter, from crystals to complex materials: a Review", arXiv:2503.20266v1 [cond-mat.mtrl-sci] 26 Mar 2025
[17] R. Solé, C.P. Kempes, B. Corominas-Murtra, M. De Domenico, A. Kolchinsky, M. Lachmann, E. Libby, S. Saavedra, E. Smith, D. Wolpert "Fundamental Constraints to the Logic of Living Systems",
[18] F. Hallé, R.A.A. Oldeman, P.B. Tomlinson " Tropical trees and forests " Springer-Verlag, 1978.
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  • APA Style

    Alberti, G. (2025). Properties of a System of Diophantine Equations with Implications for Real-World Constrained Branching Processes. Science Journal of Applied Mathematics and Statistics, 13(5), 111-127. https://doi.org/10.11648/j.sjams.20251305.12

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    ACS Style

    Alberti, G. Properties of a System of Diophantine Equations with Implications for Real-World Constrained Branching Processes. Sci. J. Appl. Math. Stat. 2025, 13(5), 111-127. doi: 10.11648/j.sjams.20251305.12

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    AMA Style

    Alberti G. Properties of a System of Diophantine Equations with Implications for Real-World Constrained Branching Processes. Sci J Appl Math Stat. 2025;13(5):111-127. doi: 10.11648/j.sjams.20251305.12

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  • @article{10.11648/j.sjams.20251305.12,
      author = {Giuseppe Alberti},
      title = {Properties of a System of Diophantine Equations with Implications for Real-World Constrained Branching Processes},
      journal = {Science Journal of Applied Mathematics and Statistics},
      volume = {13},
      number = {5},
      pages = {111-127},
      doi = {10.11648/j.sjams.20251305.12},
      url = {https://doi.org/10.11648/j.sjams.20251305.12},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sjams.20251305.12},
      abstract = {We consider an iterative branching process in which an abstract object can subdivide into other objects. The multiplication process may be varied by the occurrence of random "fatal" events in which some of the subsequent objects or states may fail. The process is also constrained to terminate upon reaching a given number of events or alternatively upon reaching a fixed number of iteration steps. A system of diophantine integer-variable equations capable of describing the aforementioned process is proposed. These equations can be applied prospectively to many branching phenomena of physical, biological and demographic nature. The equations, which we call systems of equations S, Q, U can be reformulated into three main classes based on the behavior of the sum of variables with respect to a fixed principal numerical parameter (TC= 'Total Cases'). These systems always admit solutions and these are sought for the three classes. The mathematical properties of the three systems are presented both analytically and graphically, and the software script for calculating numerical solutions is attached. In the case of high TC values, where direct calculation is not possible, special solutions are also sought for the steady state case and the "most probable" case, the latter using statistical mechanics methods. Solutions examples are given for a wide range of TC parameters. We also refer to real-world examples of applications ranging from prey/predator population dynamics to population mortality modeling and 2d lattice space tiling and also tree leaves branching alternatives. The main purpose of the study here proposed is to implement a mathematical frame that can provide tools to be used in the study of real-world applications.},
     year = {2025}
    }
    

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    Y1  - 2025/12/27
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    AB  - We consider an iterative branching process in which an abstract object can subdivide into other objects. The multiplication process may be varied by the occurrence of random "fatal" events in which some of the subsequent objects or states may fail. The process is also constrained to terminate upon reaching a given number of events or alternatively upon reaching a fixed number of iteration steps. A system of diophantine integer-variable equations capable of describing the aforementioned process is proposed. These equations can be applied prospectively to many branching phenomena of physical, biological and demographic nature. The equations, which we call systems of equations S, Q, U can be reformulated into three main classes based on the behavior of the sum of variables with respect to a fixed principal numerical parameter (TC= 'Total Cases'). These systems always admit solutions and these are sought for the three classes. The mathematical properties of the three systems are presented both analytically and graphically, and the software script for calculating numerical solutions is attached. In the case of high TC values, where direct calculation is not possible, special solutions are also sought for the steady state case and the "most probable" case, the latter using statistical mechanics methods. Solutions examples are given for a wide range of TC parameters. We also refer to real-world examples of applications ranging from prey/predator population dynamics to population mortality modeling and 2d lattice space tiling and also tree leaves branching alternatives. The main purpose of the study here proposed is to implement a mathematical frame that can provide tools to be used in the study of real-world applications.
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