Results 251 to 260 of about 2,869,429 (284)
Some of the next articles are maybe not open access.
2005
The k-spectrum of a word is the multiset of its non-contiguous subwords of length k. For given k, how small can n be for a pair of different words of length n to exist, with equal k- spectra? From the Thue-Morse word we find that n is at most 2k. The construction of this paper decreases this upper bound to θk, where $\bumpeq$ is the golden ratio; the ...
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The k-spectrum of a word is the multiset of its non-contiguous subwords of length k. For given k, how small can n be for a pair of different words of length n to exist, with equal k- spectra? From the Thue-Morse word we find that n is at most 2k. The construction of this paper decreases this upper bound to θk, where $\bumpeq$ is the golden ratio; the ...
openaire +1 more source
1974
It is often useful to ask of a point in the spectrum of an operator how it got there. To say that A is in the spectrum of A means that A — λ is not invertible. The question reduces therefore to this: why is a non-invertible operator not invertible?
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It is often useful to ask of a point in the spectrum of an operator how it got there. To say that A is in the spectrum of A means that A — λ is not invertible. The question reduces therefore to this: why is a non-invertible operator not invertible?
openaire +1 more source
2012
This book gives an elementary treatment of the basic material about graph spectra, both for ordinary, and Laplace and Seidel spectra. The text progresses systematically, by covering standard topics before presenting some new material on trees, strongly regular graphs, two-graphs, association schemes, p-ranks of configurations and similar topics ...
Brouwer, A.E., Haemers, W.H.
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This book gives an elementary treatment of the basic material about graph spectra, both for ordinary, and Laplace and Seidel spectra. The text progresses systematically, by covering standard topics before presenting some new material on trees, strongly regular graphs, two-graphs, association schemes, p-ranks of configurations and similar topics ...
Brouwer, A.E., Haemers, W.H.
openaire +2 more sources
Raman spectra and surface changes of microplastics weathered under natural environments
Science of the Total Environment, 2020Mingtan Dong +2 more
exaly
X-Ray Spectra and Time Variability of Active Galactic Nuclei
Annual Review of Astronomy and Astrophysics, 1993Chris Done
exaly
Optical spectra and structure of oligomeric models of polyparaphenylenevinylene
Journal of Chemical Physics, 1991Klaus Mullen
exaly