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Czechoslovak Mathematical Journal
Volume 25
Issue 4
Article
Havel, Václav
Universality property of free groupoid extensions of halfgroupoids and its geometrical meaning
.
(English).
Czechoslovak Mathematical Journal
,
vol. 25 (1975), issue 4
,
pp. 562-567
MSC:
20L05
|
MR 0412304
|
Zbl 0327.20022
| DOI:
10.21136/CMJ.1975.101352
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References:
[1] G. E. Bates:
Free loops and nets and its generalizations
. Amer. Journ. Math. 69 (1947), 499-550.
DOI 10.2307/2371882
|
MR 0021001
[2] R. H. Bruck:
A survey of binary systems
. Berlin-Göttingen-Heidelberg 1958.
MR 0093552
|
Zbl 0081.01704
[3] T. Evans:
Homomorphisms of non-associative systems
. Journ. London Math. Soc. 24 (1949), 254-260.
DOI 10.1112/jlms/s1-24.4.254
|
MR 0032664
[4] W. Peremans. :
Abstract algebraic systems
. Rapport ZW 1949-003 of Math. Centrum Amsterdam, 12 pp.; Math. Rev. 16, 897.
MR 0031473
[5] K. Pickert:
Projektive Ebenen
. Berlin-Göttingen-Heidelberg 1955.
Zbl 0066.38707
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