Now showing items 6-13 of 13

• #### Nonlinear matroid optimization and experimental design ﻿

[OWP-2007-06] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-24)
We study the problem of optimizing nonlinear objective functions over matroids presented by oracles or explicitly. Such functions can be interpreted as the balancing of multi-criteria optimization. We provide a combinatorial ...
• #### On test sets for nonlinear integer maximization ﻿

[OWP-2007-05] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-23)
A finite test set for an integer maximation problem enables us to verify whether a feasible point atains the global maximum. We establish in this paper several general results that apply to integer maximization problems ...
• #### Resolution of symplectic cyclic orbifold singularities ﻿

[OWP-2007-03] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-21)
In this paper we present a method to obtain resolutions of symplectic orbifolds arising as quotients of pre-symplectic semi-free S1-actions. This includes, in particular, all orbifolds arising from symplectic reduction of ...
• #### Secondary heat flow between confocal ellipses: an application of extended thermodynamics ﻿

[OWP-2007-11] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-27)
Much as non-Newtonian fluids exhibit secondary flows in elliptic pipes, rarefied gases exhibit secondary heat flows between elliptical cylinders. The phenomenon may be called non-Fourierian, because it is not covered by ...
• #### Self-dual polygons and self-dual curves ﻿

[OWP-2007-09] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-25)
• #### Slowly oscillating wave solutions of a single species reaction-diffusion equation with delay ﻿

[OWP-2007-12] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-28)
We study positive bounded wave solutions $u(t, x) = \phi(\nu \cdot x+ct)$, $\phi(-\infty)=0$, of equation $u_t(t, x)=\delta u(t,x)−u(t,x) +g(u(t−h,x))$, $x \in \mathbb{R}^m$(*). It is supposed that Eq. (∗) has exactly two ...
• #### Vector bundles on degenerations of elliptic curves and Yang-Baxter equations ﻿

[OWP-2007-04] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-22)
In this paper we introduce the notion of a gemetric associative r-matrix attached to a genus one fibration with a section and irreducible fibres. It allows us to study degenerations of solutions of the classical Yang-Baxter ...
• #### Zeta functions of 3-dimensional p-adic Lie algebras ﻿

[OWP-2007-10] (Mathematisches Forschungsinstitut Oberwolfach, 2007-03-26)
We give an explicit formula for the subalgebra zeta function of a general 3-dimensional Lie algebra over the $p$-adic integers $\mathbb{Z}_p$. To this end, we associate to such a Lie algebra a ternary quadratic form over ...