Results 11 to 20 of about 3,164,915 (295)

A Note on Sums of Powers [PDF]

open access: yes, 2007
We improve a result of Bennett concerning certain sequences involving sums of powers of positive ...
Gao, Peng
core   +6 more sources

Sums of Powers and Majorization [PDF]

open access: yes, 2007
We study certain sequences involving sums of powers of positive integers and in connection with this, we give examples to show that power majorization does not imply ...
Gao, Peng
core   +7 more sources

A-Browder-type theorems for direct sums of operators [PDF]

open access: yesMathematica Bohemica, 2016
We study the stability of a-Browder-type theorems for orthogonal direct sums of operators. We give counterexamples which show that in general the properties $(\rm SBaw)$, $(\rm SBab)$, $(\rm SBw)$ and $(\rm SBb)$ are not preserved under direct sums of ...
Mohammed Berkani   +2 more
doaj   +1 more source

Partially Coherent Direct Sum Channels [PDF]

open access: yesQuantum, 2021
We introduce Partially Coherent Direct Sum (PCDS) quantum channels, as a generalization of the already known Direct Sum quantum channels. We derive necessary and sufficient conditions to identify the subset of those maps which are degradable, and provide a simplified expression for their quantum capacities.
Stefano Chessa, Vittorio Giovannetti
openaire   +6 more sources

Direct Sum Testing

open access: yesProceedings of the 2015 Conference on Innovations in Theoretical Computer Science, 2015
Summary: The \textit{\(k\)-fold direct sum encoding} of a string \(a\in\{0,1\}^n\) is a function \(f_a\) that takes as input sets \(S\subseteq [n]\) of size \(k\) and outputs \(f_a(S)=\sum_{i\in S}a_i\pmod 2\). In this paper we prove a direct sum testing theorem. We describe a three query test that accepts with probability one any function of the form \
Roee David   +4 more
openaire   +5 more sources

ZWIĄZKI SUM PROMIENIOWANIA SŁONECZNEGO Z WIELKOŚCIĄ ZACHMURZENIA NA PODSTAWIE DANYCH Z LAT 1981–2015 ZE STACJI POŁOŻONYCH W POLSKIEJ CZĘŚCI KARPAT [PDF]

open access: yesPrzegląd Geofizyczny, 2023
The presence of cloud cover usually reduces incoming solar radiation. The influence of cloudiness on solar energy reaching Earth’s surface mostly depends on the cloud amount, its genera and other properties. Due to processes of absorption, scattering and
Izabela Wojciechowska
doaj   +1 more source

$k$-bitransitive and compound operators on Banach spaces

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2016
In this this paper, we introduce new classes of operators in complex Banach spaces, which we call $k$-bitransitive operators and compound operators to study the direct sum of diskcyclic operators.
N. Bamerni, A. Kilicman
doaj   +1 more source

From Oscillatory Integrals and Sublevel Sets to Polynomial Congruences and Character Sums [PDF]

open access: yes, 2010
We present a slight extension of a classical lemma of Hensel and give various applications to polynomial congruences and character sums; in particular, we give a new proof of a classical result of Hua on complete exponential sums.
James Wright, Wright, James
core   +1 more source

Restricted divisor sums [PDF]

open access: yes, 2002
There is a body of work in the literature on various restricted sums of the number of divisors of an integer function including that described in [2-9, 11] and summarised in Section 2 ...
Broughan, Kevin A.
core   +1 more source

An Algorithm for the explicit evaluation of GL(n, R) Kolsterman sums [PDF]

open access: yes, 2009
An algorithm for the explicit evaluation of Kloosterman sums for GL(n, R) for n ≥2 and an implementation in the Mathematics package GL(n) pack are ...
Broughan, Kevin A.
core   +1 more source

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