Results 11 to 20 of about 2,041,584 (301)
On Perfect Sequence Covering Arrays
Annals of Combinatorics, 2022 AbstractA PSCA$$(v, t, \lambda )$$ ( v , t , λ ) is a multiset of permutations of the v-element alphabet $$\{0, \dots , v-1\}$$
Amber Gentle, Ian M. Wanless
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Perfect and Imperfect Duty: Unpacking Kant's Complex Distinction [PDF]
, 2023 I attempt first to disentangle three aspects of Kant’s distinction between perfect and imperfect duty. There is the central distinction between principles of duty contrary to that which is contradictory in conception/consistent in conception but ...
Hope, Simon James
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Perfect and almost perfect sequences
Discrete Applied Mathematics, 1999 This is essentially a survey article concerning periodic \(\pm 1-\)sequences whose out-of phase (or off-peak) autocorrelation function has extremal properties. Such a binary sequence is perfect if the out-of-phase autocorrelation function has only two different values and these values are as small as possible.
Jungnickel, Dieter, Pott, Alexander
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ON PERFECT POWERS IN LUCAS SEQUENCES [PDF]
International Journal of Number Theory, 2005 Let (un)n≥0be the binary recurrence sequence of integers given by u0= 0, u1= 1 and un+2= 2(un+1+ un). We show that the only positive perfect powers in this sequence are u1= 1 and u4= 16. We further discuss the problem of determining perfect powers in Lucas sequences in general.
Bugeaud, Yann +3 more
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Multi-sequences with d-perfect property [PDF]
Journal of Complexity, 2004 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Xiutao Feng, Quanlong Wang, Zongduo Dai
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Perfect and imperfect views of ultraconserved sequences [PDF]
Nature Reviews Genetics, 2021 Across the human genome, there are nearly 500 'ultraconserved' elements: regions of at least 200 contiguous nucleotides that are perfectly conserved in both the mouse and rat genomes. Remarkably, the majority of these sequences are non-coding, and many can function as enhancers that activate tissue-specific gene expression during embryonic development.
Valentina Snetkova +3 more
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Chapter 14. The Swedish perfect and periphrasis
, 2021 This paper investigates the apparent near-optionality of the perfect auxiliary ha (‘have’) in Swedish. Restrictions on the near-optionality of ha-omission are typically recognized in the previous literature as lexical or structural. The paper scrutinizes
Fredrik Heinat, Heinat, Fredrik,
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Diffuse Sequences and Perfect C ∗ -Algebras [PDF]
Transactions of the American Mathematical Society, 1986 The concept of a diffuse sequence in a C ∗
Akemann, Charles A. +2 more
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On a Class of Almost Perfect Sequences
Journal of Algebra, 1997 An \(n\)-periodic sequence \((s_i)\) with entries \(\pm1\) is almost perfect if all but one of the sums \(\sum^{n-1}_{i=0} s_is_{i+1}\) (\(t\not\equiv 0\pmod n\)) are zero. Any almost perfect sequence is equivalent to a cyclic difference set in \(\mathbb{Z}_n\) of size \(k={n\over 2}-\theta\) and \(\lambda_1=\theta(\theta-1)\), \(\lambda_2={n\over 4 ...
Arasu, K.T., Ma, S.L., Voss, N.J.
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Perfect sequence covering arrays [PDF]
Designs, Codes and Cryptography, 2019 An $(n,k)$ sequence covering array is a set of permutations of $[n]$ such that each sequence of $k$ distinct elements of $[n]$ is a subsequence of at least one of the permutations. An $(n,k)$ sequence covering array is perfect if there is a positive integer $λ$ such that each sequence of $k$ distinct elements of $[n]$ is a subsequence of precisely $λ ...
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