This paper illustrates the themes of the title in terms of: van Kampen type theorems for the fundamental groupoid; holonomy and monodromy groupoids; and higher homotopy groupoids. Interaction with work of the writer is explored.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-bc76-0-3,
author = {Ronald Brown},
title = {Three themes in the work of Charles Ehresmann: local-to-global; groupoids; higher dimensions},
journal = {Banach Center Publications},
volume = {75},
year = {2007},
pages = {51-63},
zbl = {1123.01015},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc76-0-3}
}
Ronald Brown. Three themes in the work of Charles Ehresmann: local-to-global; groupoids; higher dimensions. Banach Center Publications, Tome 75 (2007) pp. 51-63. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc76-0-3/