Analytics tracing and diagrams reading the network topology may be reading outdated information and could therefore return inaccurate results. Dirty areas are used to mark information that is new to the network and has not been reflected in the network topology. The network topology must be validated to include these changes in tracing and diagram operations. Validation of a network topology is not an automatic operation that is performed after every edit.
The validation process can be initiated by using the Validate command on the Utility Network tab , or via the Validate Network Topology tool. When working with an enterprise geodatabase, it is recommended that you use the Validate Network Topology tool for longer-running validation operations with a large extent or number of edits.
The Validate Network Topology tool takes advantage of asynchronous processing. See Validate a network topology for more information. During a network topology validation event, various network properties, restrictions, and consistencies are evaluated for all network features.
Among the items reviewed are network rules and edge connectivity policies. Items causing inconsistent or ambiguous conditions are tracked via errors.
Dirty areas that have associated errors will remain until the error situation is corrected. These could be resolved by making edits to the feature or by performing configuration changes to allow the error situation. Making configuration changes requires the network topology to be disabled.
Dive-in: The validate operation does not evaluate unlocatable junction and edge objects. The network topology must be disabled and enabled to reflect changes made to these objects.
For the list of error situations, see Error management. Two geographical extent options are offered when you initiate the validation process using the Validate command on the Utility Network tab : Current Extent —The network topology is validated for the current extent of the map. This option is more common and recommended when edits have been performed in a localized area or work zone.
Entire Extent —Validating the entire extent involves a potentially heavy operation depending on the size, complexity, and number of dirty areas in your network. This operation is recommended when there are many edits scattered geographically throughout the network that need to be validated. When you validate the network topology based on a specific extent, the dirty areas that intersect the validation extent are clipped.
In the image below, the purple shaded polygons represent dirty areas and the extent of the validate operation is represented by the black box. When you validate the network topology based on a specific extent, it is important to be aware of the following: The entire dirty area is evaluated when a dirty area associated with an error is partially contained within the validation extent. After you validate a topology, dirty areas may still be present if the current extent was validated and it did not encompass all of the dirty areas in the network.
A network feature is not guaranteed to be valid until the full extent of the feature's dirty area is validated. If there are any dirty areas associated with a network feature, this will impact tracing and update subnetwork operations that use the validate consistency trace configuration option. When a validate operation is performed, subnetworks that intersect the dirty areas are marked as dirty and the network diagrams are marked as inconsistent.
The Update Subnetwork tool is used to update a dirty subnetwork and switch subnetwork system diagrams back to a consistent state.
Non-system-generated network diagrams can be made consistent with network features by using the Update Diagram tool. To learn more about the process for updating subnetworks, see Update a subnetwork. Notes on Cobordism Robert E. Video recordings of the lectures can will be available soon at this link filmed and edited by Michael Jehlik.
Talk 3: The homotopy category of spaces Inna Zakharevich. Talk 1: Equivariant Generalizations 1 Dylan Wilson. Any opinions, findings and conclusions or recomendations expressed in this material are those of the author s and do not necessarily reflect the views of the National Science Foundation NSF.
You will need the following application material: A cover letter describing your background and why you want to participate to the program A curriculum vitae Transcripts A letter of recommendation Registered students will be contacted by email in due course. Because of funding restrictions, priority must be given to US citizens and permanent residents. List of courses Minicourse by Howard Masur.
Such surfaces are called translation surfaces. This mini course will serve as an introduction to this subject.
I will discuss the problem of finding surface subgroups; that is, subgroups which are isomorphic to the fundamental group of a closed surface. This course will show how to prove the existence of surface subgroups in several classes of groups, including amalgams and HNN extensions of free groups, random groups, and hyperbolic 3-manifold groups.
Although ostensibly about a specific algebraic phenomenon, this course will be almost entirely concerned with general geometric and topological methods to build "locally good" continuous maps between topological spaces. This course should be accessible to any student who has knowledge of the fundamental group. Background on hyperbolic geometry and delta-hyperbolic groups would be nice but is not necessary, as I will cover this material.
Course materials are available here. In these lectures, we will explore the properties of maps on surfaces with positive entropy. The ultimate goal is to understand why a surface diffeomorphism with positive entropy must contain a horseshoe, a hallmark of chaos. This result was originally proved by Anatole Katok in , and elements of the proof include ergodic theory, the shadowing lemma, and symbolic dynamics.
This topic has strong connections to algebraic geometry, 3-manifold theory, 4-manifold theory, dynamical systems, and many other topics.
0コメント