منابع مشابه
Unicity Subspaces in L ’ - Approximation
In 1918 A. Haar [4] characterized those n-dimensional subspaces U, of C[O, l] for which there exists a unique best approximation to every realvalued function f E C[O, l] in the uniform (L”) norm. Haar proved that uniqueness always holds if and only if U, is a Tchebycheff (T-) system on [0, 11, or what is sometimes referred to as a Haar system (or Haar space). This simply means that no u E U,\ {...
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— Steganography is about how to send secret message covertly. And the purpose of steganalysis is to not only detect the existence of the hidden message but also extract it. So far there have been many reliable detecting methods on various steganographic algorithms, while there are few approaches that can extract the hidden information. In this paper, the difficulty of extracting hidden informat...
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ژورنال
عنوان ژورنال: Journal d'Analyse Mathématique
سال: 2020
ISSN: 0021-7670,1565-8538
DOI: 10.1007/s11854-020-0117-4