Results 21 to 30 of about 52 (52)

Tree-like graphings, wallings, and median graphings of equivalence relations

Forum of Mathematics, Sigma
We prove several results showing that every locally finite Borel graph whose large-scale geometry is ‘tree-like’ induces a treeable equivalence relation.
Ruiyuan Chen, Antoine Poulin, Ran Tao, Anush Tserunyan   +3 more
doaj   +1 more source

Measurable Vizing’s theorem

Forum of Mathematics, Sigma
We prove a full measurable version of Vizing’s theorem for bounded degree Borel graphs, that is, we show that every Borel graph $\mathcal {G}$ of degree uniformly bounded by $\Delta \in \mathbb {N}$ defined on a standard probability space
Jan Grebík
doaj   +1 more source

Structural, point-free, non-Hausdorff topological realization of Borel groupoid actions

Forum of Mathematics, Sigma
We extend the Becker–Kechris topological realization and change-of-topology theorems for Polish group actions in several directions. For Polish group actions, we prove a single result that implies the original Becker–Kechris theorems, as well as Sami’s ...
Ruiyuan Chen
doaj   +1 more source

The definable content of homological invariants II: Čech cohomology and homotopy classification

Forum of Mathematics, Pi
This is the second installment in a series of papers applying descriptive set theoretic techniques to both analyze and enrich classical functors from homological algebra and algebraic topology.
Jeffrey Bergfalk, Martino Lupini, Aristotelis Panagiotopoulos   +2 more
doaj   +1 more source

Space and time distribution of humus content of the district cambisole in different forest ecosystems of the Cer mountain

, 1997
In order to comprehend the link between the litter decomposition process and the formation of humus on the one hand, and the complex processes of transformation and disintegration of organic matter on the other, the time and space dynamics of humus ...
Pavlović, Pavle, Mitrović, Miroslava, Popović, Ranka, Kostić, Olga   +3 more
core  

Analysis of photosynthetic efficiency of species Fagus sylvatica L. and silviculture Picea abies Karst. in beech habitat on Maljen mountain

, 1998
The aim of this research was examination of vitality of beech Fagus sylvatica L. in the mountain beech forest habitat, as well as vitality of individuals of spruce Picea abies Karst.
Pavlović, Pavle, Jovanović, Zorica, Mitrović, Miroslava, Đurđević, Lola, Popović, Ranka, Kostić, Olga, Karadžić, Branko   +6 more
core  

Allelopathic investigations in the Fraxino angustifoliae-Quercetum robojus ( Jov. et Tomic 1979) forest community with the autumnal truffle (Tuber macrosporum Vitt.)

, 1999
Both the total phenols and phenolic acids (PA) were analyzed in the litter and soil of the mixed Quercus robur-Fraxinus angustifolia forest with the autumnal truffle (Tuber macrosporum Vitt.).
Milenković, Miroljub, Pavlović, Pavle, Đurđević, Lola, Kostić, Olga   +3 more
core  

On Strong Measure Zero Subsets of ...

, 1997
This paper answers three questions posed in [1]. Theorem 2.7 The family of strong measure zero subsets of ! 1 2 is 2 @ 1 -additive under GMA and CH. Theorem 3.1 The generalized Borel conjecture is false in ! 1 2 assuming ZFC+CH.
Aapo Halko, Saharon Shelah
core  

A version of κ -Miller forcing. [PDF]

Arch Math Log, 2020
Mildenberger H, Shelah S.
europepmc   +1 more source

Descriptive set-theoretical properties of an abstract density operator

Open Mathematics, 2009
Gła̧b Szymon
doaj   +1 more source