How to centralize and normalize quandle extensions
2018 ◽
Vol 27
(02)
◽
pp. 1850020
We show that quandle coverings in the sense of Eisermann form a (regular epi)-reflective subcategory of the category of surjective quandle homomorphisms, both by using arguments coming from categorical Galois theory and by constructing concretely a centralization congruence. Moreover, we show that a similar result holds for normal quandle extensions.
Keyword(s):
2017 ◽
Vol 48
(1)
◽
pp. 18-29
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2013 ◽
Vol 46
(45)
◽
pp. 455203
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Keyword(s):
2008 ◽
Vol 319
(2)
◽
pp. 779-799
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2011 ◽
Vol 07
(01)
◽
pp. 173-202