High Dimensional Space to Formulate Marriage and Birth Functions

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Shuichirou Ike (Teikyo University, Department of Sociology, 359 Ootuka, Hachiouji, Tokyo 192-0395 Japan)

High Dimensional Space to Formulate Marriage and Birth Functions

Shuichirou Ike (Teikyo University, Department of Sociology, 359 Ootuka, Hachiouji, Tokyo 192-0395 Japan)

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English

CRC Press
04 October 2024

Population & demography

With the collapse of Demographic Transition Theory, new theories of population must not just be explanations, but should be falsifiable theories which can compute the number of occurrences of marriages and births. This book reviews computable marriage and birth function using dynamic properties. To do that, the functions are defined in high dimensional space. The reaction-diffusion equation of the number of children in a space is applied to these phenomena, providing solutions to many problems concerning a decline in fertility. The functions are developed as stochastic maps based on the present behaviors of successive behaviors in a geographical space. As we assume that there is an inter-dependence of human behaviors, we use the law of dynamics concerning the function of marriage and birth. The exact mathematical definition of interactions in a space naturally implies a causal relation. For the function concerning the number of children of parents, two geographical-dimensional spaces are required.

The decline in fertility in Belgium due to different languages is explained, and the longer fertility period in Brittany is explained by the Laplacian of the diffusion equation. Depending on the degree of symbolic control over behaviors, we need to add the degree of the dimension of the space. For the marriage function, we add age as a biological dimension to the geographical space. In this higher dimensional space, the mapping from neighboring present marriages to neighboring successive marriages is no less than that of the marriage function. These chain reactions caused the baby boom as an exothermal reaction-diffusion. Birth functions require one to add the marriage-age dimension to two geographical and age dimensions so that it is a five dimensional hypersurface. It can, thus, determine birth probabilities of a female who married at a certain age. The phenomenon of modern fertility decline may only be the result of these chain reactions. These processes are solely dependent upon time-space, and not on socioeconomic conditions. This is the very reason why we are able to predict it mathematically.

The book provides a new thinking in fertility decline for demographic research. Readers need to be aware that the fertility decline experienced throughout the modern era is a spatial pattern formation (as a reaction-diffusion). The author hopes new mathematical applications in human activities are developed through these new models.

By: Shuichirou Ike (Teikyo University Department of Sociology 359 Ootuka Hachiouji Tokyo 192-0395 Japan)
Imprint: CRC Press
Country of Publication: United Kingdom
Dimensions: Height: 234mm, Width: 156mm,
Weight: 453g
ISBN: 9781032134710
ISBN 10: 1032134712
Pages: 346
Publication Date: 04 October 2024
Audience: Professional and scholarly , Undergraduate
Format: Paperback
Publisher's Status: Active

Shuichirou Ike is a mathematical sociologist. His specialty is demography, social psychology, and social research. He obtained his Ph.D. Sociology from Tokyo University and is a professor in the Department of Sociology, Faculty of Letter of Teikyo University, Japan. He has been the chief of the Information Processing Center of Teikyo University, Hachioji since 2011. He is a member of the Public Information Committee of the Population Association of Japan and explores society as a stochastic process.