Resumen: The modified Bessel function (MBF) of the first kind is a fundamental special function in mathematics with applications in a large number of areas. When the order of this function is integer, it has an integral representation which includes the exponential of the cosine function. Here, we generalize this MBF to include a fractional parameter, such that the exponential in the previously mentioned integral is replaced by a Mittag–Leffler function. The necessity for this generalization arises from a problem of communication in networks. We find the power series representation of the fractional MBF of the first kind as well as some differential properties. We give some examples of its utility in graph/networks analysis and mention some fundamental open problems for further investigation. Idioma: Inglés DOI: 10.3390/math11071630 Año: 2023 Publicado en: Mathematics 11, 7 (2023), 1630 [13 pp.] ISSN: 2227-7390 Factor impacto JCR: 2.3 (2023) Categ. JCR: MATHEMATICS rank: 21 / 490 = 0.043 (2023) - Q1 - T1 Factor impacto CITESCORE: 4.0 - Mathematics (all) (Q1) - Engineering (miscellaneous) (Q2) - Computer Science (miscellaneous) (Q2)