Content of CMUC 21 (1980), No.2
- Bureš J., Vanžura J.
- A Nijenhuis-type tensor on the quotient of a distribution. Comment.Math.Univ.Carolinae 21(1980) 201--208.
- Bican L.
- Purely finitely generated Abelian groups. Comment.Math.Univ.Carolinae 21(1980) 209--218.
- Vinárek J.
- Representations of countable commutative semigroups by products of weakly homogeneous spaces. Comment.Math.Univ.Carolinae 21(1980) 219--229.
- Haslinger J., Lovíšek J.
- Mixed variational formulation of unilateral problems. Comment.Math.Univ.Carolinae 21(1980) 231--246.
- Pytkeev E.G., Yakovlev N.N.
- On bicompacta which are unions of spaces defined by means of coverings. Comment.Math.Univ.Carolinae 21(1980) 247--261.
- Yakovlev N.N.
- On bicompacta in $\Sigma $-products and related spaces. Comment.Math.Univ.Carolinae 21(1980) 263--283.
- Gardner B.J.
- Extension-closure and attainability for varieties of algebras with involution. Comment.Math.Univ.Carolinae 21(1980) 285--292.
- Jirásková H.
- Generalized flatness and coherence. Comment.Math.Univ.Carolinae 21(1980) 293--308.
- Kolář I.
- On the automorphisms of principal fibre bundles. Comment.Math.Univ.Carolinae 21(1980) 309--312.
- Lee S.-M.
- On a simple one-element extension of left zero semigroups. Comment.Math.Univ.Carolinae 21(1980) 313--318.
- Meister H.
- Zum Fixpunktverhalten nichtexpansiver Abbildungen. Comment.Math.Univ.Carolinae 21(1980) 319--331.
- Dostál Z.
- A note on estimate of the spectral radius of symmetric matrices. Comment.Math.Univ.Carolinae 21(1980) 333--340.
- Kepka T., Němec P.
- Trilinear constructions of quasimodules. Comment.Math.Univ.Carolinae 21(1980) 341--354.
- Kepka T.
- Commutative Moufang loops and distributive Steiner quasigroups nilpotent of class $3$. Comment.Math.Univ.Carolinae 21(1980) 355--370.
- Glastad B., Hopkins G.
- Commutative semigroup rings which are principal ideal rings. Comment.Math.Univ.Carolinae 21(1980) 371--377.
- Čerych J.
- A characterization of $C(X)$. Comment.Math.Univ.Carolinae 21(1980) 379--383.
- Dvurečenskij A., Riečan B.
- On the individual ergodic theorem on a logic. Comment.Math.Univ.Carolinae 21(1980) 385--391.
- Jackett D.R.
- The nil-degree of a torsion-free Abelian group. Comment.Math.Univ.Carolinae 21(1980) 393--406.