Abstract
Given a polygon inscribed inside of a circle with vertices satisfying the equation z N = 1, we introduce a new class of periodic functions called the “geometric polygon functions.” Methodology used to construct and analyze the classical circular and elliptic functions is essential for defining the cosine polygon, sine polygon, and dine polygon functions, called the “geometric polygon functions.” Dividing N into two sub-cases, odd values and even values, allows mutually exclusive sets. Focusing on even values of N, the square functions are introduced as the smallest most significant case within this sub-case. The square functions provide the building blocks for larger even values of N for which additional analysis is presented. The goals of this research are to introduce the “geometric polygon functions” and compute the Fourier series expansion of the square functions. These findings can be manipulated to prove results in matroid theory. In particular, the construct of the “geometric polygon functions” are representations of graphs whose bicircular matroids have well controlled circuit spectra.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Mirotin, A. R., Mirotin E. A. On sums and products of periodic functions. Real Analysis Exchange. 34, 347–358 (2009)
Silverman, R., Tolstov, G.P. Fourier Series. Dover Publications. (1976)
Huang, N., Huang, W., Fung, Y., Shen, Z. Engineering analysis of biological variables: An example of blood pressure over 1 day. Real Analysis Exchange. 95, 4816–4821 (1998)
Fan, M., Wang, K. Periodic solutions of a discrete time nonautonomous ratio-dependent predator-prey system. Mathematical and Computational Modeling. 34, 951–961 (2002)
Wang, J., Zhang, J. Periodic solutions for discrete predator-prey systems with the Beddington-DeAngelis functional response. Applied Mathematics Letters. 19, 1361–1366 (2006)
Germano, G and et al. Fourier and related analyses: An approach to study blood pressure nyctohemeral cycle. Blood Pressure and Heart Rate Variability: Computer Analysis, Methodology and Clinical Applications. 85–93 (1992)
Jiaxu, L., Yang, K. Analysis of a model of the glucose-insulin regulatory system with two delays. Society for Industrial and Applied Mathematics. 67 757–776 (2007)
Schwalm, W. Elliptic functions as trigonometry. pp. 1–1 to 1–10. Morgan and Claypool Publishers (2002)
Lewis, T., Mickens, R.E. Square functions as a dynamic system. Proceedings of Dynamic Systems and Applications. 7 268–274 (2016)
Mickens, R.E. Some properties of square (periodic) functions. Proceedings of Dynamic Systems and Applications. 7 282–286 (2016)
Bayeh, C., Bernard, M., Moubayed, N. Introduction to the elliptical trigonometry. WSEAS Transactions on Mathematics. 8 282–286 (2009)
Johannessen, K. A nonlinear differential equation related to the Jacobi elliptic functions. International Journal of Differential Equations. 2012 282–286 (2012)
Milne-Thomson, L.M. Handbook of Mathematical Functions, Dover Publications, New York, NY (1972), Edited by: M. Abramowitz, M., Stegun, I.A.
Stewart, J. Essential Calculus: Early Transcendentals 6th. Thomson Higher Education, Belmont CA (2007)
Lewis, T., McNulty, J., Neudauer, N.A., Reid, T.J., Sheppardson, L. Bicircular matroid designs. Ars Combinatoria. 110 513–523 (2013)
Acknowledgements
The author’s research is supported by the National Science Foundation, Human Resources Division, grant number 1700408; Dr. Ronald Mickens serves as senior collaborator on the project. The author thanks Springer for providing a catalyst that displays the talent of the EDGE women and their colleagues. Support from the EDGE organizers, editors, and reviewers is greatly appreciated as their efforts help to showcase the scholarly work of women studying Mathematics. Special thanks to family and friends that sacrificed time to ensure the completion of the project. Lastly, the author sincerely thanks Michelle Craddock for introducing her to the EDGE program in 2008.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2019 The Author(s) and the Association for Women in Mathematics
About this chapter
Cite this chapter
Lewis, T. (2019). Trigonometric-Type Functions Derived from Polygons Inscribed in the Unit Circle. In: D'Agostino, S., Bryant, S., Buchmann, A., Guinn, M., Harris, L. (eds) A Celebration of the EDGE Program’s Impact on the Mathematics Community and Beyond . Association for Women in Mathematics Series, vol 18. Springer, Cham. https://doi.org/10.1007/978-3-030-19486-4_19
Download citation
DOI: https://doi.org/10.1007/978-3-030-19486-4_19
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-030-19485-7
Online ISBN: 978-3-030-19486-4
eBook Packages: Mathematics and StatisticsMathematics and Statistics (R0)