Geodesic

Sommaire du Fascicule no. 1

About the sixth Hilbert's problem
p. 1,2
Existence and uniqueness of periodic solutions of linear differential equations in Banach spaces
p. 53-76
Semivaluations and $d$-groups
p. 77-89
Durch Relationen induzierte Topologien
p. 90-98
On the effect of the perturbation of a nonnegative matrix on its Perron eigenvector
p. 99-109
Direct decomposability of tolerances on lattices, semilattices and quasilattices
p. 110-115
On subdirect irreducibility and its variants
p. 116-128
The lattice of equational theories. Part III: Definability and automorphisms
p. 129-164
In memoriam Academician Vladimír Kořínek
p. 165,167
Summaries of articles published in our journal
p. 176

Sommaire du Fascicule no. 2

Oscillatory and asymptotic behavior of second and third order retarded differential equations
p. 169-182
Duality theory for linear $n$-th order integro-differential operators with domain in $L^p_m$ determined by interface side conditions
p. 183-196
A new method for obtaining eigenvalues of variational inequalities: operators with multiple eigenvalues
p. 197-207
Bifurcation points of variational inequalities
p. 208-226
Quotient spaces defined by linear relations
p. 227-232
Remarks on the interpolation of anisotropic spaces of Besov-Hardy-Sobolev type
p. 233-244
Generalized Volterra integral equations
p. 245-270
Oscillation of $n$-th order linear and nonlinear delay differential equations
p. 271-274
On the transformation theory of ordinary second-order linear symmetric differential expressions
p. 275-306
Partial monounary algebras with common congruence relations
p. 307-326
1981-- the bicentenary of Bernard Bolzano
p. 327,329
Professor Miroslav Laitoch sexagenarian
p. 334-337
Sixty years of Professor Miroslav Novotný
p. 338-343
News and Notices
p. 344-345
Summaries of articles published in this issue
p. 352

Sommaire du Fascicule no. 3

Torsion radicals of lattice ordered groups
p. 347-363
К теории многообразий решеточно упорядоченных групп
p. 364-372
On a result of Etgen and Lewis
p. 373-376
The structure of the minimum group kernel of a regular semigroup
p. 377-383
Idempotents and inverses in conventional semigroups
p. 384-388
Some curvature identities for commutative spaces
p. 389-396
The Laplacian permanental polynomial for trees
p. 397-403
Normal form of the NK-curvature operators
p. 404-417
A chain of Kurosh may have an arbitrary finite length
p. 418-422
Integral equivalence of two systems of differential equations
p. 423-436
On congruence relations of monounary algebras. I
p. 437-459
Cyclically ordered sets
p. 460-473
On limits of $L_p$-norms of linear operators
p. 474-480
On the Lie algebra of vertical prolongation operators
p. 481-487
Simultaneous solutions of a system of Abel equations and differential equations with several deviations
p. 488-494
In memoriam Professor Josef Korous
p. 495-497
The sixtieth anniversary of Professor Milan Kolibiar
p. 498-503
To the sixtieth anniversary of birthday of Professor Otto Vejvoda
p. 504-510

Sommaire du Fascicule no. 4

Summaries of articles published in this issue
On elongations of totally projective $p$-groups by $p^{\omega+n}$-projective $p$-groups
p. 511-515
Generalizations of the classical Chebyshev polynomials to polynomials in two variables
p. 516-528
Contextual grammars vs. context-free algebras
p. 529-547
Distributivity of intervals of torsion radicals
p. 548-555
Simultaneous integrability of an almost complex and an almost tangent structure
p. 556-581
Factorizations of matrices and functions of two variables
p. 582-588
A singular spectral identity and inequality involving the Dirichlet integral of an ordinary differential expression
p. 589-607
Absolutely convergent expansions associated with a boundary-value problem with the eigenvalue parameter contained in one boundary condition
p. 608-622
Congruence extension from a semilattice to the freely generated distributive lattice
p. 623-626
A simple proof of the minimax-theorem
p. 627-629
The least separative congruence on a weakly commutative semigroup
p. 630-632
Asymptotic equivalence of differential equations with Stepanoff-bounded functional perturbation
p. 633-639
The category of Pawlak machines
p. 640-647
Coelevation of a graph
p. 648-654
Around Bolzano's approach to real numbers
p. 655-666
Bolzano's infinitesimal numbers
p. 667-670