Characterisation of Singular Domains in Threshold-Dependent Biological Networks
Keywords:
Discontinuous System, Singular Domain, Threshold-Dependent Network, Biological System, Piecewise Linear ModelsAbstract
Threshold-dependent networks behave like piecewise smooth system which belongs to a class of systems with discontinuous right hand side. It can be studied with piecewise linear differential equations. At threshold values and their intersections, known as switching boundaries and surfaces, the state of such networks is not defined because of singularity at such points. These states are termed singular states or domains of the network. This study is to characterise, in terms of number, singular domains of any order in a network and the total number of such domains. It shall also propose new definitions for walls which are switching domains of order one. The new definition, which derives from Fillipov’s First Order Theory on characterisation of (sliding) wall, shall be shown to prove better than existing ones as it can reveal intrinsic behaviours in such networks.
Published
How to Cite
Issue
Section
Copyright (c) 2022 Benitho Ngwu, Godwin C. E. Mbah, Chika O. Mmaduakor, Sunday Isienyi, Oghenekevwe R. Ajewole, Felix D. Ajibade

This work is licensed under a Creative Commons Attribution 4.0 International License.
How to Cite
Similar Articles
- A. S. Halilu, M.A. Mohamed, I. A. R. Moghrabi, K. Ahmed, S. M. Ibrahim, M. Y. Waziri, S. Murtala, H. Abdullahi, M. A. Jada, A modified Dai–Yuan method with restart mechanism for nonlinear system of equations with a signal recovery , Journal of the Nigerian Society of Physical Sciences: Volume 8, Issue 3, August 2026
- M. A. Okono, E. P. Agbo, B. J. Ekah, U. J. Ekah, E. B. Ettah, C. O. Edet, Statistical Analysis and Distribution of Global Solar Radiation and Temperature Over Southern Nigeria , Journal of the Nigerian Society of Physical Sciences: Volume 4, Issue 3, August 2022
- E. C. Duru, M. C. Anyanwu , T. N. Nnamani , C. N. Nwosu, G. C. E. Mbah, Semi-analytical solution and numerical simulations of a coinfection model of Malaria and Zika virus disease , Journal of the Nigerian Society of Physical Sciences: Volume 7, Issue 2, May 2025
- Kazeem A. Tijani, Chinwendu E. Madubueze, Reuben I. Gweryina, Terhemen Aboiyar, Mathematical modelling and optimal-control strategies of schistosomiasis–typhoid fever co-infection: using the demographic setting of Makurdi, Benue State, Nigeria , Journal of the Nigerian Society of Physical Sciences: Volume 8, Issue 3, August 2026
- Jinta Jose, Rajesh K. Thumbakara, J. D. Thenge Mashale, Bobin George, Sijo P. George, Homomorphic and restricted homomorphic products of soft graphs , Journal of the Nigerian Society of Physical Sciences: Volume 7, Issue 1, February 2025
- Mahesh Kumar Singh, Arun Kumar Singh, Pushpa Choudhary, Akhilesh Kumar Singh, Lalit Kumar Tyagi, A practical deep learning framework for multi-class skin cancer detection using U-Net segmentation and ResNet50 transfer learning , Journal of the Nigerian Society of Physical Sciences: Volume 8, Issue 3, August 2026
- Ebere Uzoka Chidi, Edward Anoliefo, Collins Udanor, Asogwa Tochukwu Chijindu, Lois Onyejere Nwobodo, A blind navigation guide model for obstacle avoidance using distance vision estimation based YOLO-V8n , Journal of the Nigerian Society of Physical Sciences: Volume 7, Issue 1, February 2025
- I. E. Otuokere, J. G. Ohwimu, K. C. Amadi, C. O. Alisa, F. C. Nwadire, O. U. Igwe, A. A. Okoyeagu, C. M. Ngwu, Synthesis, Characterization and Molecular Docking Studies of Mn (II) Complex of Sulfathiazole , Journal of the Nigerian Society of Physical Sciences: Volume 1, Issue 3, August 2019
- Richard Olu Awonusika, Oluwaseun Akinlo Mogbojuri, Approximate Analytical Solution of Fractional Lane-Emden Equation by Mittag-Leffler Function Method , Journal of the Nigerian Society of Physical Sciences: Volume 4, Issue 2, May 2022
- P. K. Alimo, G. Lartey-Young, S. Agyeman, T. Y. Akintunde, E. Kyere-Gyeabour, F. Krampah, A. Awomuti, O. Oderinde, A. O. Agbeja, O. G. Afolabi, Spatial distribution and policy implications of the exhaust emissions of two-stroke motorcycle taxis: a case study of southwestern state in Nigeria , Journal of the Nigerian Society of Physical Sciences: Volume 6, Issue 2, May 2024
You may also start an advanced similarity search for this article.

