Criteria for Homotopic Maps to be So Along Monotone Homotopies
نویسنده
چکیده
The state spaces of machines admit the structure of time. A homotopy theory respecting this additional structure can detect machine behavior unseen by classical homotopy theory. In an attempt to bootstrap classical tools into the world of abstract spacetime, we identify criteria for classically homotopic, monotone maps of pospaces to future homotope, or homotope along homotopies monotone in both coordinates, to a common map. We show that consequently, a hypercontinuous lattice equipped with its Lawson topology is future contractible, or contractible along a future homotopy, if its underlying space has connected CW type.
منابع مشابه
A Criterion for Homotopic Maps to Be Dihomotopic
In an attempt to bootstrap classical homotopy theoretic tools into the world of abstract spacetime, we identify a criterion under which two maps of compact pospaces which are homotopic in the classical sense are also homotopic through monotone maps. As a corollary, we show that a hypercontinuous lattice equipped with its Lawson topology is contractible through monotone maps if its underlying sp...
متن کاملFixed Point Sets of Fiber-preserving Maps
Let F = (E, p, B;Y ) be a fiber bundle where E, B and Y are connected finite polyhedra. Let f : E → E be a fiber-preserving map and A ⊆ E a closed, locally contractible subset. We present necessary and sufficient conditions for A and its subsets to be the fixed point sets of maps fiber-homotopic to f . The necessary conditions correspond to those introduced by Schirmer in 1990 but, in the fiber...
متن کاملOn the Height of a Homotopy
Given 2 homotopic curves in a topological space, there are several ways to measure similarity between the curves, including Hausdorff distance and Fréchet distance. In this paper, we examine a different measure of similarity which considers the family of curves represented in the homotopy between the curves, and measures the longest such curve, known as the height of the homotopy. In other word...
متن کاملSolution of Bounded Nonlinear Systems of Equations Using Homotopies with Inexact Restoration
Nonlinear systems of equations often represent mathematical models of chemical production processes and other engineering problems. Homotopic techniques (in particular, the bounded homotopies introduced by Paloschi) are used for enhancing convergence to solutions, especially when a good initial estimate is not available. In this paper, the homotopy curve is considered as the feasible set of a m...
متن کاملAutomorphisms and Embeddings of Surfaces and Quadruple Points of Regular Homotopies
Let F be a closed surface. If i, i′ : F → R3 are two regularly homotopic generic immersions, then it has been shown in [5] that all generic regular homotopies between i and i′ have the same number mod 2 of quadruple points. We denote this number by Q(i, i′) ∈ Z/2. For F orientable we show that for any generic immersion i : F → R3 and any diffeomorphism h : F → F such that i and i ◦ h are regula...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Electr. Notes Theor. Comput. Sci.
دوره 230 شماره
صفحات -
تاریخ انتشار 2009