Collapsing

Some articles on collapsing:

Collapsing Sequences - Examples
... Another common collapsing sequence is illustrated below This type of collapsing sequence speeds up social interaction by averting unnecessary explanations ... Collapsing sequences can be used in other situations as well, such as when someone joins a discussion already in progress ...
Compass (drafting) - Compass and Straightedge
... The most rigorous definition of this abstract tool is the "collapsing compass" having drawn a circle from a given point with a given radius, it disappears it cannot simply be moved to another point and used to draw ... proposition (Book I of the Elements) that such a collapsing compass could be used to transfer a distance, proving that a collapsing compass could do anything a real compass can do ...
Ordinal Collapsing Function
... In mathematical logic and set theory, an ordinal collapsing function (or projection function) is a technique for defining (notations for) certain recursive large ... For this reason, ordinal collapsing functions are described as an impredicative manner of naming ordinals ... The details of the definition of ordinal collapsing functions vary, and get more complicated as greater ordinals are being defined, but the typical ...
List Of Forcing Notions - Levy Collapsing
... Collapsing a cardinal to ω P is the set of all finite sequences of ordinals less than a given cardinal λ ... Collapsing a cardinal to another P is the set of all functions from a subset of κ of cardinality less than κ to λ (for fixed cardinals κ and λ) ... Levy collapsing If κ is regular and λ is inaccessible, then P is the set of functions p on subsets of λ× κ with domain of size less than κ and p(α,ξ) ...
Eternally Collapsing Objects
... Magnetospheric eternally collapsing objects or MECOs are proposed alternatives to black holes advocated by Darryl Leiter and Stanley Robertson ... They are a variant of eternally collapsing objects or ECOs proposed by Abhas Mitra in 1998 ... in order for a black hole to form, the collapsing matter must travel faster than the speed of light with respect to a fixed observer ...