搜索结果: 1-10 共查到“数学 Contractions”相关记录10条 . 查询时间(0.058 秒)
Stability conditions and extremal contractions
Stability conditions extremal contractions Algebraic Geometry
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2012/4/18
We show that any extremal contraction from a smooth projective variety with dimension less than or equal to three appears as a moduli space of (semi)stable objects in the derived category of coherent ...
Contracting planar graphs to contractions of triangulations
planar graph dual graph contraction topological minor
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2011/1/20
For every graph H, there exists a polynomial-time algorithm deciding if a planar input graph G can be contracted to H. However, the degree of the polynomial depends on the size of H. In this paper, we...
Cyclic contractions and best proximity pair theorems
cyclic contraction semi sharp proximinal pair cyclically complete pair
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2011/1/19
In this paper we introduce a notion called cyclically complete pair for a pair (A,B) of subsets of a metric space. A necessary condition is given for a cyclic contraction
T on A ∪ B to have a unique ...
Numerical ranges of $C_0(N)$ contractions
Contraction unitary dilation numerical range
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2010/12/3
A conjecture of Halmos proved by Choi and Li states that the closure of the numerical range of a contraction on a Hilbert space is the intersection of the closure of the numerical ranges of all its un...
On Matsaev's conjecture for contractions on noncommutative $L_p$-spaces
Matsaev’s conjecture noncommutative Lp-spaces complex interpolation Schur multipliers
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2010/12/1
We exhibit large classes of contractions on noncommutative Lp-spaces which satisfy the non-
commutative analogue of Matsaev’s conjecture, introduced by V.V. Peller.
Contractions of Filippov algebras
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2010/11/29
We introduce in this paper the contractions Gc of n-Lie (or Filippov) algebras G and show that they have a semidirect structure as their n = 2 Lie algebra counterparts.As an example, we compute the no...
Fixed point theorems for the generalized C-contractions
Probabilistic metric space Fuzzy metric space
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2010/9/14
In this paper, by using the concept of p-convergency we obtain two fixed point theorems for (q1, q2)-contraction of (, λ)-type and generalized C-contraction.
A convergence theorem via a new fixed point theorem for generalized contractions
τ -function τ 0-metric Nadler’s fixed point theorem
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2010/9/13
In this paper, we study the properties of τ 0-metrics introduced and studied by Du [1], and establish a new fixed point theorem and convergence theorem for τ 0-metrics.
A Property of Weak Convergence of Positive Contractions of Von Neumann Algebras
Positive contraction mixing completely mixing von Neumann algebra
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2010/2/26
In the present paper we prove that the mixing property of positive L1-contraction of finite von Neumann algebras implies the property of complete mixing.
A characterization of semiampleness and contractions of relative curves
semiampleness contractions relative curves
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2010/11/1
A line bundle with a base-point-free multiple is called semiample. I give a cohomological characterization of semiample line bundles. The result is a common generalization of the Fujita-Zariski criter...