Contents of CMUC 2020 (4)

Preface
Comment.Math.Univ.Carolin. 61,4 (2020) 409-410 Abstract, Full text(PS, PDF)

Barbora Batíková, Tomáš J. Kepka, Petr C. Němec
Inequalities of DVT-type -- the one-dimensional case
Comment.Math.Univ.Carolin. 61,4 (2020) 411-426 Abstract, Full text(PS, PDF)

Natalia Didurik, Victor Shcherbacov
Units in quasigroups with classical Bol--Moufang type identities
Comment.Math.Univ.Carolin. 61,4 (2020) 427-435 Abstract, Full text(PS, PDF)

Diane M. Donovan, Mike Grannell, Emine Ş. Yazic\i
Constructing and embedding mutually orthogonal Latin squares: reviewing both new and existing results
Comment.Math.Univ.Carolin. 61,4 (2020) 437-457 Abstract, Full text(PS, PDF)

Aleš Drápal, Jan Hora
Nonassociative triples in involutory loops and in loops of small order
Comment.Math.Univ.Carolin. 61,4 (2020) 459-479 Abstract, Full text(PS, PDF)

Aleš Drápal, Michael Kinyon
Normality, nuclear squares and Osborn identities
Comment.Math.Univ.Carolin. 61,4 (2020) 481-500 Abstract, Full text(PS, PDF)

Ágota Figula, Péter T. Nagy
Inverse property of nonassociative abelian extensions
Comment.Math.Univ.Carolin. 61,4 (2020) 501-511 Abstract, Full text(PS, PDF)

$\dagger$ Marcell Gaál
The operation $ABA$ in operator algebras
Comment.Math.Univ.Carolin. 61,4 (2020) 513-521 Abstract, Full text(PS, PDF)

Mark Greer, Lee Raney
Automorphic loops and metabelian groups
Comment.Math.Univ.Carolin. 61,4 (2020) 523-534 Abstract, Full text(PS, PDF)

Andrew R. Kozlik
The centre of a Steiner loop and the maxi-Pasch problem
Comment.Math.Univ.Carolin. 61,4 (2020) 535-545 Abstract, Full text(PS, PDF)

Markku Niemenmaa
On finite commutative IP-loops with elementary abelian inner mapping groups of order $p^5$
Comment.Math.Univ.Carolin. 61,4 (2020) 547-551 Abstract, Full text(PS, PDF)

Jonathan D. H. Smith
Semisymmetrization and Mendelsohn quasigroups
Comment.Math.Univ.Carolin. 61,4 (2020) 553-566 Abstract, Full text(PS, PDF)

Fedir Sokhatsky, Alla Lutsenko
Classification of quasigroups according to directions of translations I
Comment.Math.Univ.Carolin. 61,4 (2020) 567-579 Abstract, Full text(PS, PDF)