Results 231 to 240 of about 799 (268)
Some of the next articles are maybe not open access.
The Annals of Mathematics, 1969
Let X be a topological space with A c X a subspace, and let z-: (X, A) (X, A) be an involution; i.e., a continuous map z-: X X with square the identity and such that MA c A. Combining the notions of bordism (Atiyah [1]) and of differentiable periodic maps (Conner and Floyd [4]), one may define bordism groups of the involution (X, A, z). Specifically, a
openaire +1 more source
Let X be a topological space with A c X a subspace, and let z-: (X, A) (X, A) be an involution; i.e., a continuous map z-: X X with square the identity and such that MA c A. Combining the notions of bordism (Atiyah [1]) and of differentiable periodic maps (Conner and Floyd [4]), one may define bordism groups of the involution (X, A, z). Specifically, a
openaire +1 more source
International Journal of Foundations of Computer Science, 2007
In this paper we study a generalization of the classical notions of bordered and unbordered words, motivated by DNA computing. DNA strands can be viewed as finite strings over the alphabet {A, G, C, T}, and are used in DNA computing to encode information. Due to the fact that A is Watson-Crick complementary to T and G to C, DNA single strands that are
Lila Kari, Kalpana Mahalingam
openaire +2 more sources
In this paper we study a generalization of the classical notions of bordered and unbordered words, motivated by DNA computing. DNA strands can be viewed as finite strings over the alphabet {A, G, C, T}, and are used in DNA computing to encode information. Due to the fact that A is Watson-Crick complementary to T and G to C, DNA single strands that are
Lila Kari, Kalpana Mahalingam
openaire +2 more sources
The Mathematical Gazette, 1947
We prove some theorems on commutative involutions in a “real” projective geometry in which cobasal homographie ranges may have 0, 1 or 2 self-corresponding points (and therefore a conic and a general line in its plane have 0, 1 or 2 points of intersection).
openaire +2 more sources
We prove some theorems on commutative involutions in a “real” projective geometry in which cobasal homographie ranges may have 0, 1 or 2 self-corresponding points (and therefore a conic and a general line in its plane have 0, 1 or 2 points of intersection).
openaire +2 more sources
Canadian Journal of Mathematics, 1974
In this note we prove some results which assert that under certain conditions the involution on a prime ring must satisfy a form of positive definiteness. As a consequence of the first of our theorems we obtain a fairly short and simple proof of a recent theorem of Lanski [3].
openaire +2 more sources
In this note we prove some results which assert that under certain conditions the involution on a prime ring must satisfy a form of positive definiteness. As a consequence of the first of our theorems we obtain a fairly short and simple proof of a recent theorem of Lanski [3].
openaire +2 more sources
Programming and Computer Software, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
2011
A square involution is a square permutation which is also an involution. The authors prove that the number of square involutions of length \(n\) is \[ (n+2)2^{n-3}-(n-2)\binom{n-3}{\lfloor \frac{n-3}{2}\rfloor},n\geq 3. \]
F. Disanto, FROSINI, ANDREA, S. Rinaldi
openaire +4 more sources
A square involution is a square permutation which is also an involution. The authors prove that the number of square involutions of length \(n\) is \[ (n+2)2^{n-3}-(n-2)\binom{n-3}{\lfloor \frac{n-3}{2}\rfloor},n\geq 3. \]
F. Disanto, FROSINI, ANDREA, S. Rinaldi
openaire +4 more sources
Constraints, 1997
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
Involutive divisions for effective involutive algorithms
Journal of Mathematical Sciences, 2006The paper deals with the notion of complete global involutive division. Based on the graph approach to investigate the involutive division, the author proves noetherity criteria and criteria justifying that the division is global. Also a new series of involutive divisions with continuity property is found.
openaire +2 more sources