trace positive

См. также в других словарях:

• Trace evidence — contends that every contact, no matter how slight, will leave a trace. The trace is normally caused by objects or substances contacting one another, and leaving a minute sample on the contact surfaces. Material is often transferred by heat… …   Wikipedia

• Trace class — In mathematics, a trace class operator is a compact operator for which a trace may be defined, such that the trace is finite and independent of the choice of basis. Trace class operators are essentially the same as nuclear operators, though many… …   Wikipedia

• Trace (algèbre) — Pour les articles homonymes, voir Trace. En algèbre linéaire, la trace d une matrice carrée A est définie comme la somme de ses coefficients diagonaux et notée Tr(A). La trace peut être vue comme une forme linéaire sur l espace vectoriel des… …   Wikipédia en Français

• Positive linear functional — In mathematics, especially in functional analysis, a positive linear functional on an ordered vector space ( V , ≤) is a linear functional f on V so that for all positive elements v of V , that is v ge;0, it holds that:f(v)geq 0.In other words, a …   Wikipedia

• Trace (linear algebra) — In linear algebra, the trace of an n by n square matrix A is defined to be the sum of the elements on the main diagonal (the diagonal from the upper left to the lower right) of A, i.e., where aii represents the entry on the ith row and ith column …   Wikipedia

• Positive-definite matrix — In linear algebra, a positive definite matrix is a matrix that in many ways is analogous to a positive real number. The notion is closely related to a positive definite symmetric bilinear form (or a sesquilinear form in the complex case). The… …   Wikipedia

• Dixmier trace — In mathematics, the Dixmier trace, introduced by Jacques Dixmier (1966), is a non normal trace on a space of linear operators on a Hilbert space larger than the space of trace class operators. Some of its applications to noncommutative… …   Wikipedia

• Partial trace — In linear algebra and functional analysis, the partial trace is a generalization of the trace. Whereas the trace is a scalar valued function on operators, the partial trace is an operator valued function. The partial trace has applications in… …   Wikipedia

• Matrice positive — Sommaire 1 Matrice positive 1.1 Définitions 1.2 Relation d ordre sur les matrices réelles 2 Matrices carrées positives …   Wikipédia en Français

• Selberg trace formula — In mathematics, the Selberg trace formula is a central result, or area of research, in non commutative harmonic analysis. It provides an expression for the trace, in a sense suitably generalising that of the trace of a matrix, for suitable… …   Wikipedia

• Jeu à somme positive — Théorie des jeux Le dilemme du prisonnier est une célèbre illustration en théorie des jeux d un jeu à somme non nulle. La théorie des jeux constitue une approche mathématique de problèmes de stratégie tels qu’on en trouve en recherche… …   Wikipédia en Français