At this stage we are only able to show that certain spaces are simply connected: normally it’s quite difficult to prove directly the existence of loops that aren’t homotopic to constant paths. There are indirect methods for this, and this chapter is dedicated to one such.
CITATION STYLE
Manetti, M. (2015). Covering spaces. In UNITEXT - La Matematica per il 3 piu 2 (Vol. 91, pp. 199–217). Springer-Verlag Italia s.r.l. https://doi.org/10.1007/978-3-319-16958-3_12
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