Sigmoid functions for the smooth approximation to the absolute value function

Autor: Bagul Yogesh J., Chesneau Christophe
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Moroccan Journal of Pure and Applied Analysis, Vol 7, Iss 1, Pp 12-19 (2021)
Druh dokumentu: article
ISSN: 2351-8227
DOI: 10.2478/mjpaa-2021-0002
Popis: We present smooth approximations to the absolute value function |x| using sigmoid functions. In particular, x erf(x/μ) is proved to be a better smooth approximation for |x| than x tanh(x/μ) and x2+μ\sqrt {{x^2} + \mu } with respect to accuracy. To accomplish our goal we also provide sharp hyperbolic bounds for the error function.
Databáze: Directory of Open Access Journals