- journal articles metadata
European Mathematical Society Publishing House
2024-03-28 12:47:14
8
https://www.ems-ph.org/meta/jmeta-stream.php?jrn=ZAA&vol=6&iss=4&update_since=2024-03-28
Zeitschrift für Analysis und ihre Anwendungen
Z. Anal. Anwend.
ZAA
0232-2064
1661-4534
Partial differential equations
Ordinary differential equations
Integral equations
Numerical analysis
10.4171/ZAA
http://www.ems-ph.org/doi/10.4171/ZAA
subscribers
European Mathematical Society Publishing House
Zuerich, Switzerland
© European Mathematical Society (from 2006)
6
1987
4
Nonuniform Conditions for Periodic Solutions of Forced Liénard Systems with Distinct Delays
Giuseppe
Conti
Università degli Studi di Firenze, FIRENZE, ITALY
R.
Iannacci
Università di Roma La Sapienza, ROMA, ITALY
M.N.
Nkashama
Université Catholique de Louvain, LOUVAIN-LA-NEUVE, BELGIUM
We use classical Leray-Schauder techniques and the coincidence degree in order to obtain the existence or periodic solutions of forced Liénard systems with distinct delays, under nonuniform conditions. The resonance and nonresonance case with respect to the eigenvalue zero are considered.
General
289
300
10.4171/ZAA/251
http://www.ems-ph.org/doi/10.4171/ZAA/251
Some problems in the theory of approximately differentiable functions (in Russian)
Nikolay
Isakov
, MOSCOW, RUSSIAN FEDERATION
Global and local properties of approximatively differentiable functions are studied.
General
301
320
10.4171/ZAA/252
http://www.ems-ph.org/doi/10.4171/ZAA/252
Die Grundgleichungen der inneren Elektronik - ein Evolutionsproblem im Banach-Raum
Lutz
Angermann
TU Clausthal, CLAUSTHAL-ZELLERFELD, GERMANY
The basic equations of inner electronics are investigated as a differential equation with special structure in a suitable Banach space. Existence, uniqueness, regularity and physical relevance of the solution are proved.
General
321
330
10.4171/ZAA/253
http://www.ems-ph.org/doi/10.4171/ZAA/253
On Polyharmonic Riemannian Manifolds
Rainer
Schimming
Ernst-Moritz-Arndt-Universität Greifswald, GREIFSWALD, GERMANY
Jan
Kowolik
University of Opole, OPOLE, POLAND
A natural generalization of the harmonic manifolds is considered: a Riemannian manifold is called $k$-harmonic or polyharmonic if it admits a non-constant $k$-harmonic function depending only on the geodesic distance $r = r(x, y)$ or rather on Synge’s function $\sigma = \sigma (x, y)$, i.e. a solution $F$ of $\Delta^k F(\sigma) = 0$. Certain theorems are generalized from harmonic to polyharmonic manifolds.
General
331
339
10.4171/ZAA/254
http://www.ems-ph.org/doi/10.4171/ZAA/254
Abelian Theorem for the Distributional Stieltjes Transform
Stevan
Pilipović
University Novi Sad, NOVI SAD, SERBIA
Bogoljub
Stanković
University Novi Sad, NOVI SAD, SERBIA
Using the notion of quasi-asymptotic behaviour at infinity of tempered distributions, we give an Abelian theorem for the distributional Stieltjes transform. It includes all known results, as well as some new ones.
General
341
349
10.4171/ZAA/255
http://www.ems-ph.org/doi/10.4171/ZAA/255
On the Optimality of Methods for Ill-Posed Problems
Gennadi
Vainikko
Tartu University, TARTU, ESTONIA
The optimality of a class of regularization methods for linear ill-posed problems is investigated. The general results are applied to Lavrentjew’s and Tikhonov’s methods and to a class of iteration methods and their continuous versions.
General
351
362
10.4171/ZAA/256
http://www.ems-ph.org/doi/10.4171/ZAA/256
Universale Rettungskurven II
Rolf
Klötzler
, BORSDORF, GERMANY
Sabine
Pickenhain
Brandenburgische Technische Universität Cottbus, COTTBUS, GERMANY
It is proved, that the optimal live-saving line, founded in Part I under special structural assumptions, is also optimal without these assumptions.
General
363
369
10.4171/ZAA/257
http://www.ems-ph.org/doi/10.4171/ZAA/257
Zur Lösung des linearisierten Knickstab-Problems mit beschränkter Ausbiegung
Hoàng Xuân
Phú
Institute of Mathematics, HANOI, VIETNAM
The problem of rod capable of creasing under a load on its upper end and situated in a narrow strip-shaped channel is replaced by a linearized problem, which is then solved completely.
General
371
384
10.4171/ZAA/258
http://www.ems-ph.org/doi/10.4171/ZAA/258