Results 21 to 30 of about 1,857,722 (261)
A sufficient condition for hyperinvariance [PDF]
Proceedings of the American Mathematical Society, 1976 A linear transformation on a finite-dimensional complex linear space has the property that all of its invariant subspaces are hyperinvariant if and only if its lattice of invariant subspaces is distributive [1]. It is shown that an operator on a complex Hilbert space has this property if its lattice of invariant subspaces satisfies a certain ...
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Sound Hashing Modes of Arbitrary Functions, Permutations, and Block Ciphers
IACR Transactions on Symmetric Cryptology, 2018 Cryptographic hashing modes come in many flavors, including Merkle-Damgård with various types of strengthening, Merkle trees, and sponge functions. As underlying primitives, these functions use arbitrary functions, permutations, or block ciphers. In this
Joan Daemen +2 more
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On sufficient conditions for overconvergence [PDF]
Proceedings of the American Mathematical Society, 1955 Ostrowski has shown that a Taylor series f(z)= n aZnn with finite nonzero radius of convergence overconverges in a neighborhood of each point of the circle of convergence at which f(z) is regular if an=O for ...
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Notes on oscillation of linear delay differential equations
Advances in Difference Equations, 2018 This paper deals with the oscillation criteria for the linear delay differential equations. We present new sufficient conditions for the oscillation of all solutions of such equations.
Božena Dorociaková +2 more
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Spectral Sufficient Conditions on Pancyclic Graphs
Complexity, 2021 A pancyclic graph of order n is a graph with cycles of all possible lengths from 3 to n. In fact, it is NP-complete that deciding whether a graph is pancyclic.
Guidong Yu +3 more
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Sufficient conditions to be exceptional
Special Matrices, 2016 A copositive matrix A is said to be exceptional if it is not the sum of a positive semidefinite matrix and a nonnegative matrix. We show that with certain assumptions on A−1, especially on the diagonal entries, we can guarantee that a copositive matrix A
Johnson Charles R., Reams Robert B.
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Errata to Sound Hashing Modes of Arbitrary Functions, Permutations, and Block Ciphers
IACR Transactions on Symmetric Cryptology, 2020 In ToSC 2018(4), Daemen et al. performed an in-depth investigation of sound hashing modes based on arbitrary functions, permutations, or block ciphers. However, for the case of invertible primitives, there is a glitch.
Aldo Gunsing, Joan Daemen, Bart Mennink
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Necessary and sufficient conditions for quasisymmetry [PDF]
Physics of Plasmas, 2020 A necessary and sufficient set of conditions for a quasisymmetric magnetic field in the form of constraint equations is derived from first principles. Without any assumption regarding the magnetohydrodynamic (MHD) equilibrium of the plasma, conditions for quasisymmetry are constructed starting from the single-particle Lagrangian to the leading order ...
E. Rodríguez +2 more
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Sufficient Conditions for Labelled 0-1 Laws [PDF]
Discrete Mathematics & Theoretical Computer Science, 2008 If F(x) = e G(x), where F(x) = Σf(n)x n and G(x) = Σg(n)x n, with 0≤g(n) = O(n θn /n!), θ∈(0,1), and gcd(n: g(n) >0)=1, then f(n)= o(f(n-1)).
Stanley Burris, Karen Yeats
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Journal of the Royal Statistical Society Series B: Statistical Methodology, 1964 Summary The concept of sufficiency can be examined locally for a neighbourhood of a parameter point θ0 and it leads to an estimate that has minimum variance among locally-unbiased estimates (Fraser, 1964). This local estimate generates the natural global estimate for the case of the simple exponential model, but it does not do so for the
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