Discussiones Mathematicae - General Algebra and Applications 21(2) (2001)

1
A. Kartashova
Cardinalities of lattices of topologies of unars and some related topics 		PDF PS

129
2
H.J. Vogel
On the structure of halfdiagonal-halfterminal-symmetric categories with diagonal inversions 		PDF PS

139
3
I. Chajda, G. Eigenthaler
Some modifications of congruence permutability and dually congruence regular varietie 		PDF PS

165
4
K. Denecke, J. Koppitz, S.L. Wismath
The semantical hyperunification problem 		PDF PS

175
5
W. Guo, K.P. Shum
Minimal formations of universal algebras 		PDF PS

201
6
S.R. Park, S.Z. Song
Maximal column rank preservers of fuzzy matrices 		PDF PS

207
7
Sr. Arworn, K. Denecke
Tree transformations defined by hypersubstitutions 		PDF PS

219
8
I. Chajda, H. Langer
Congruence classes in Brouwerian semilattices 		PDF PS

229
9
D. Dorninger, H. Langer, M. Maczyński
Ring-like structures with unique symmetric difference related to quantum logic 		PDF PS

239
10
J. Płonka
The lattice of subvarieties of the biregularization of the variety of Boolean algebras 		PDF PS

255

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