Results 231 to 240 of about 123,515 (261)
Some of the next articles are maybe not open access.
On the meaning of gauge invariance
Il Nuovo Cimento, 1962The role of the gauge invariance is analysed. Such an invariance guarantees that the given vector field (of electromagnetic or Yang-Mills kind) describes spin 1 only. Contrary to the statement of many authors (1–13) it is shown that the requirement of the gauge invariance cannot be a principle for obtaining nontrivial interactions and for deducing the ...
Ogievetski, V. I., Polubarinov, I. V.
openaire +2 more sources
Illumination invariant Mean-shift tracking
2013 IEEE Workshop on Applications of Computer Vision (WACV), 2013Visual tracking is a critical task in surveillance and activity analysis. One of the major issues in visual target tracking is variations in illumination. In this paper, we propose a novel algorithm based on discrete cosine transform (DCT) to handle illumination variations, since illumination variations are mainly reflected in the low-frequency band ...
Gargi S. Phadke, Rajbabu Velmurugan
openaire +1 more source
Invariance, Symmetry and Meaning
Foundations of Physics, 2000The role of the concept of invariance in physics and geometry is analyzed, with attention to the closely connected concepts of symmetry and objective meaning. The question of why the fundamental equations of physical theories are not invariant, but only covariant, is examined in some detail.
openaire +1 more source
A Rotational Invariant Non-local Mean
2015The image restoration and noise reduction are used to improve image quality and to develop more robust and high performance algorithms to solve denoising problems in the image processing. Every approach has their own limitations and more practicable properties with the specific conditions.
Rassulzhan Poltayev, Byung-Woo Hong
openaire +1 more source
2019
Let S be a semigroup, that is, a set endowed with an associative product $$(s, t)\mapsto st.$$ We consider the (real) Banach space of all real-valued bounded functions on S, namely, $$\ell ^\infty (S)=\Big \{f:S\rightarrow {\mathbb R}\,\,\,\text { such that}\,\,\,\Vert f\Vert \doteq \sup _{s\in S}|f(s)|
openaire +1 more source
Let S be a semigroup, that is, a set endowed with an associative product $$(s, t)\mapsto st.$$ We consider the (real) Banach space of all real-valued bounded functions on S, namely, $$\ell ^\infty (S)=\Big \{f:S\rightarrow {\mathbb R}\,\,\,\text { such that}\,\,\,\Vert f\Vert \doteq \sup _{s\in S}|f(s)|
openaire +1 more source
Invariant means on double coset spaces
Periodica Mathematica Hungarica, 2017For a locally compact group \(G\) and a compact subgroup \(K\), the author introduces the definition of a \(K\)-invariant mean: it is a continuous positive linear functional \(M\) on the space \({\mathcal BC}(G//K)\), with \(M(1)=1\), which is invariant by the \(K\)-translation operators \(\tau_y\) (\(y\in G\)): \[ \tau_yf(x)=\int_K f(ykx)dk ...
openaire +2 more sources
There is at most one continuous invariant mean
Aequationes Mathematicae, 2022Paweł Pasteczka, Pasteczka Paweł
exaly
Different Types of Invariant Means
Journal of the London Mathematical Society, 1981Rosenblatt, Joseph, Talagrand, Michel
openaire +1 more source
On Invariant Means which are not Inversion Invariant
Journal of the London Mathematical Society, 1979openaire +1 more source