Results 11 to 20 of about 141 (41)

A Novel Proof of the Heine-Borel Theorem [PDF]

open access: yes, 2008
Every beginning real analysis student learns the classic Heine-Borel theorem, that the interval [0,1] is compact. In this article, we present a proof of this result that doesn't involve the standard techniques such as constructing a sequence and ...
Macauley, Matthew   +2 more
core   +2 more sources

Baire-one mappings contained in a usco map [PDF]

open access: yes, 2006
We investigate Baire-one functions whose graph is contained in a graph of usco mapping. We prove in particular that such a function defined on a metric space with values in $\mathbb{R}^d$ is the pointwise limit of a sequence of continuous functions with ...
Kalenda, Ondřej F. K.
core   +2 more sources

Sums of two dimensional spectral triples

open access: yes, 2006
We study countable sums of two dimensional modules for the continuous complex functions on a compact metric space and show that it is possible to construct a spectral triple which gives the original metric back.
Christensen, Erik, Ivan, Cristina
core   +3 more sources

Function block for Simatic, Sinamics devices applied in position applications [PDF]

open access: yes, 2009
Cílem této bakalářské práce bylo vytvořit sadu funkčních bloků a funkcí, pomocí nichž by komunikoval programovatelný automat (PLC) Siemens S7-300 s frekvenčním měničem Siemens Sinamics S120.
Hložek, Vojtěch
core  

Quasi-metric spaces, quasi-metric hyperspaces and uniform local compactness [PDF]

open access: yes, 1999
We show that every locally compact quasi-metrizable Moore space admits a uniformly locally compact quasi-metric. We also observe that every equinormal quasi-metric is cofinally complete.
Künzi, Hans-Peter A.   +1 more
core   +1 more source

Some Results on Metric Trees

open access: yes, 2010
Using isometric embedding of metric trees into Banach spaces, this paper will investigate barycenters, type and cotype, and various measures of compactness of metric trees.
Aksoy, Asuman Guven, Oikhberg, Timur
core   +1 more source

On one-point metrizable extensions of locally compact metrizable spaces [PDF]

open access: yes, 2012
For a non-compact metrizable space $X$, let ${\mathcal E}(X)$ be the set of all one-point metrizable extensions of $X$, and when $X$ is locally compact, let ${\mathcal E}_K(X)$ denote the set of all locally compact elements of ${\mathcal E}(X)$ and ...
Koushesh, M. R.
core  

Some Comments on Edelstein’s Fixed Point Theorems in ν-Generalized Metric Spaces [PDF]

open access: yes, 2018
We study deeply two fixed point theorems in n-generalized metric spaces. The two theorems are generalizations of the famous, Edelstein’s fixed point theorem in compact metric ...
Suzuki Tomonari
core   +1 more source

Discrete Homotopy Theory and Critical Values of Metric Spaces [PDF]

open access: yes, 2012
Utilizing the discrete homotopy methods developed for uniform spaces by Berestovskii-Plaut, we define the critical spectrum Cr(X) of a metric space, generalizing to the non-geodesic case the covering spectrum defined by Sormani-Wei and the homotopy ...
Conant, Jim   +6 more
core  

Convergence and quantale-enriched categories [PDF]

open access: yes, 2017
Generalising Nachbin's theory of "topology and order", in this paper we continue the study of quantale-enriched categories equipped with a compact Hausdorff topology.
Hofmann, Dirk, Reis, Carla
core   +2 more sources

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