We establish an exact formula for the word distance on the discrete Heisenberg group ℍ₃ with its standard set of generators. This formula is then used to prove the almost connectedness of the spheres for this distance.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-cm95-1-2, author = {S\'ebastien Blach\`ere}, title = {Word distance on the discrete Heisenberg group}, journal = {Colloquium Mathematicae}, volume = {96}, year = {2003}, pages = {21-36}, zbl = {1010.05034}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm95-1-2} }
Sébastien Blachère. Word distance on the discrete Heisenberg group. Colloquium Mathematicae, Tome 96 (2003) pp. 21-36. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-cm95-1-2/