نتایج جستجو برای: upper limit to ρ

تعداد نتایج: 10689447  

2011
Walid Hachem Malika Kharouf Jamal Najim Jack W. Silverstein WALID HACHEM MALIKA KHAROUF JAMAL NAJIM

In(ρ) = 1 N log det (ΣnΣ ∗ n + ρIN ) , (ρ > 0) where Σn = n−1/2D 1/2 n XnD̃ 1/2 n + An, as the dimensions of the matrices go to infinity at the same pace. Matrices Xn and An are respectively random and deterministic N ×n matrices; matrices Dn and D̃n are deterministic and diagonal, with respective dimensions N×N and n×n; matrixXn = (Xij) has centered, independent and identically distributed entri...

2008
Marcus Berg Olaf Hohm Henning Samtleben

Gukov, Martinec, Moore and Strominger found that the D1-D5-D5′ system with the D5-D5′ angle at 45 degrees admits a deformation ρ preserving supersymmetry. Under this deformation, the D5-branes and D5’-branes reconnect along a single special Lagrangian manifold. We construct the near-horizon limit of this brane setup (for which no supergravity solution is currently known), imposing the requisite...

2013
Huy L. Nguyen

We present a new locality sensitive hashing (LSH) algorithm for c-approximate nearest neighbor search in lp with 1 < p < 2. For a database of n points in lp, we achieve O(dn ) query time and O(dn + n) space, where ρ ≤ O((ln c)/c). This improves upon the previous best upper bound ρ ≤ 1/c by Datar et al. (SOCG 2004), and is close to the lower bound ρ ≥ 1/c by O’Donnell, Wu and Zhou (ITCS 2011). T...

2016
Fuchun Lin Reihaneh Safavi-Naini Pengwei Wang

Algebraic Manipulation Detection (AMD) Codes detect adversarial noise that is added to a coded message which is stored in a storage that is opaque to the adversary. We study AMD codes when the storage can leak up to ρ log |G| bits of information about the stored codeword, where G is the group that contains the codeword and ρ is a constant. We propose ρ-AMD codes that provide protection in this ...

Journal: :Journal of Experimental and Theoretical Physics Letters 1999

2013
N. S. AYBAT

We propose a new first-order augmented Lagrangian algorithm ALCC for solving convex conic programs of the form min { ρ(x) + γ(x) : Ax− b ∈ K, x ∈ χ } , where ρ : Rn → R ∪ {+∞}, γ : Rn → R are closed, convex functions, and γ has a Lipschitz continuous gradient, A ∈ Rm×n, K ⊂ Rm is a closed convex cone, and χ ⊂ dom(ρ) is a “simple” convex compact set such that optimization problems of the form mi...

Journal: :Electronic Colloquium on Computational Complexity (ECCC) 2004
Zdenek Dvorak Daniel Král Ondrej Pangrác

An instance of a constraint satisfaction problem (CSP) is variable k-consistent if any subinstance with at most k variables has a solution. For a fixed constraint language L, ρk(L) is the largest ratio such that any variable k-consistent instance has a solution that satisfies at least a fraction of ρk(L) of the constraints. We provide an expression for the limit ρ(L) := limk→∞ ρk(L), and show t...

1998
B. S. Nagabhushana

Based on reasonable assumptions and mathematical approximations a one dimensional, analytical model for solar quiescent prominences is constructed, which is in both magnetohydrostatic and thermal equilibrium. Thermal equilibrium here is a balance among thermal conduction, radiation and wave heating. The wave heating (H) is assumed to be equal to a constant (EH ) times the product of pressure (p...

Journal: :CoRR 2016
Audra McMillan Adam D. Smith

in the δ2 metric with constant probability for at least some graphons. In particular, our bound rules out any nontrivial estimation (that is, with δ2 error substantially less than ρ) when k ≥ n√ρ. Combined with previous upper and lower bounds, our results characterize, up to logarithmic terms, the accuracy of graphon estimation in the δ2 metric. A similar lower bound to ours was obtained indepe...

2008
S. Moghimi - Araghi M. A. Rajabpour S. Rouhani

We consider the coulomb gas model on the upper half plane with different boundary conditions, namely Drichlet, Neuman and mixed. We related this model to SLE(κ, ρ) theories. We derive a set of conditions connecting the total charge of the coulomb gas, the boundary charges, the parameters κ and ρ. Also we study a free fermion theory in presence of a boundary and show with the same methods that i...

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