Results 21 to 30 of about 30,322 (273)

Inflation with $0 \leq c_{\rm s} \leq 1$

open access: yes, 2021
We investigate a novel single field inflationary scenario which allows a transition between a slow-roll k-inflation with $c_{\rm s}$ of order unity and a ghost inflation with $ c_{\rm s} \simeq 0$, where $ c_{\rm s}$ is the sound speed for the curvature perturbations.
Gorji, Mohammad Ali   +2 more
openaire   +2 more sources

Edge Disjoint Hamilton Cycles in Knödel Graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2016
The vertices of the Knödel graph $W_{\Delta, n}$ on $n \geq 2$ vertices, $n$ even, and of maximum degree $\Delta, 1 \leq \Delta \leq \lfloor log_2(n) \rfloor$, are the pairs $(i,j)$ with $i=1,2$ and $0 \leq j \leq \frac{n}{2} -1$.
Palanivel Subramania Nadar Paulraja   +1 more
doaj   +1 more source

On Bernstein inequalities for multivariate trigonometric polynomials in $L_{p}$, $0\leq p\leq \infty $

open access: yes, 2022
summary:Let ${\mathbb T}_n$ be the space of all trigonometric polynomials of degree not greater than $n$ with complex coefficients. Arestov extended the result of Bernstein and others and proved that $ \| (1/n) T'_n \|_{p} \leq \| T_n \|_{p}$ for $0 \leq
Zhao, Xingjun, Zhu, Laiyi
core   +1 more source

MUDANÇAS PALEO-HIDROLÓGICAS NA PLANÍCIE DO RIO PARAGUAI, QUATERNÁRIO DO PANTANAL

open access: yesRevista Brasileira de Geomorfologia, 2014
O Paraguai é o rio-tronco do trato de sistemas deposicionais do Pantanal. Com base em dados de sensores remotos e verificação de campo, foi realizado mapeamento geomorfológico da planície do rio Paraguai no trecho entre as confluências dos rios Cuiabá e ...
Hudson de Azevedo Macedo   +5 more
doaj   +1 more source

On the inversion number of oriented graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2022
Let $D$ be an oriented graph. The inversion of a set $X$ of vertices in $D$ consists in reversing the direction of all arcs with both ends in $X$. The inversion number of $D$, denoted by ${\rm inv}(D)$, is the minimum number of inversions needed to make $
Jørgen Bang-Jensen   +2 more
doaj   +1 more source

Bernstein inequalities in $L_p, 0\leq p\leq +\infty$

open access: yesRocky Mountain Journal of Mathematics, 1989
Let \(\|\cdot\| _ p\) denote the usual \(L_ p\) norm or quasinorm when ...
Golitschek, M.V., Lorentz, G.G.
openaire   +3 more sources

Eigenvalue characterization for a class of boundary value problems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 1999
We consider the $n$'th order ordinary differential equation $(-1)^{n-k} y^{(n)}=\lambda a(t) f(y)$, $t\in[0,1]$, $n\geq 3$ together with the boundary condition $y^{(i)}(0)=0$, $0\leq i\leq k-1$ and $y^{(l)}=0$, $j\leq l\leq j+n-k-1$, for $1\leq j\leq k-1$
C. J. Chyan, Johnny Henderson
doaj   +1 more source

On general partial Gaussian sums

open access: yesJournal of Inequalities and Applications, 2016
Let q ≥ 2 $q\geq2$ be a fixed integer, A = A ( q ) ≤ q $A=A(q)\leq q$ , B = B ( q ) ≤ q $B=B(q)\leq q$ , and H = H ( q ) ≤ q $H=H(q)\leq q$ . Define ħ ( A , B , H ) = { a ∈ Z ∣ ( a , q ) = 1 , a b ≡ 1 ( mod q ) , 1 ≤ a ≤ A , 1 ≤ b ≤ B , | a − b | ≤ H } .
Ganglian Ren   +2 more
doaj   +1 more source

Proving exact values for the $2$-limited broadcast domination number on grid graphs [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2023
We establish exact values for the $2$-limited broadcast domination number of various grid graphs, in particular $C_m\square C_n$ for $3 \leq m \leq 6$ and all $n\geq m$, $P_m \square C_3$ for all $m \geq 3$, and $P_m \square C_n$ for $4\leq m \leq 5$ and
Aaron Slobodin   +2 more
doaj   +1 more source

On energy, Laplacian energy and $p$-fold graphs

open access: yesElectronic Journal of Graph Theory and Applications, 2015
For a graph $G$ having adjacency spectrum ($A$-spectrum) $\lambda_n\leq\lambda_{n-1}\leq\cdots\leq\lambda_1$ and Laplacian spectrum ($L$-spectrum) $0=\mu_n\leq\mu_{n-1}\leq\cdots\leq\mu_1$, the energy is defined as $ E(G)=\sum_{i=1}^{n}|\lambda_i|$ and ...
Hilal A Ganie   +2 more
doaj   +1 more source

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