In this article, we study solutions of linear differential equations using Hurwitz series. We first obtain explicit recursive expressions for solutions of such equations and study the group of differential automorphisms of the solutions. Moreover, we give explicit formulas that compute the group of differential automorphisms. We require neither that the underlying field be algebraically closed nor that the characteristic of the field be zero.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-bc94-0-13,
author = {William F. Keigher and V. Ravi Srinivasan},
title = {Linear differential equations and Hurwitz series},
journal = {Banach Center Publications},
volume = {95},
year = {2011},
pages = {205-213},
zbl = {1258.12003},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc94-0-13}
}
William F. Keigher; V. Ravi Srinivasan. Linear differential equations and Hurwitz series. Banach Center Publications, Tome 95 (2011) pp. 205-213. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc94-0-13/