In topology, a subbase (or subbasis, prebase, prebasis) for the topology τ of a topological space (X, τ) is a subcollection B {\displaystyle B} of τ {\displaystyle...

In highway engineering, subbase is the layer of aggregate material laid on the subgrade, on which the base course layer is located. It may be omitted...

course, and subbase course constructed over a compacted, natural soil subgrade. When building a three layer flexible pavement, the subbase layer is not...

ultrafilter. A filter subbase that is ultra is necessarily a prefilter. A filter subbase is ultra if and only if it is a maximal filter subbase with respect to...

The pavement and subbase thicknesses are designed to withstand the wheel loads. Sometimes, geogrids are used to reinforce the subbase and further strengthen...

\subseteq } ) filter containing a given filter subbase is said to be generated by the filter subbase. The upward closure in X {\displaystyle X} of a...

used to define topologies. A weaker notion related to bases is that of a subbase for a topology. Bases for topologies are also closely related to neighborhood...

open sets Neighbourhood (mathematics) – Open set containing a given point Subbase – Collection of subsets that generate a topology Tubular neighborhood Usually...

It is also called formation level. The subgrade provides support to the subbase level and acts as an integral load-bearing layer. Failure of the subgrade...

the direct cause. Frequently, overloading happens because the base or subbase inadequately support the surface layer and subsequently cannot handle loads...

stabilized. If the final pavement is to have vehicle traffic, a layer of subbase of crushed stone or concrete must come next—this layer will even out the...

set U of all finite intersections of T. The set T is said to be a filter subbase when F (and thus U) is proper. Proper filters on sets have the finite intersection...

can form through the deformation of the asphalt concrete, pavement or subbase material. In modern roads the main cause is heavily loaded trucks. These...

bases, a smaller (subbase) and a larger (base); an example is Roman numerals, which are organized by fives (V=5, L=50, D=500, the subbase) and tens (X=10...

axiom. If X is Hausdorff and S is a subbase for Y, then the collection {V(K, U) : U ∈ S, K compact} is a subbase for the compact-open topology on C(X...

and filter subbases, all of which appear naturally and repeatedly throughout topology. Examples include neighborhood filters/bases/subbases and uniformities...

1945 Temporary inactive status, 5 Oct 1945. Subbase of Gowen Army Airfield (Boise), Idaho, 9 Oct 1945 Subbase of Walla Walla Army Airfield, Washington,...

In functional analysis and related areas of mathematics, locally convex topological vector spaces (LCTVS) or locally convex spaces are examples of topological...

Pearl Harbor. It was renamed Dover Army Airbase on April 8, 1943; *Dover Subbase on June 6, 1943, and Dover Army Airfield on February 2, 1944. With the...

finite intersection property are also called centered systems and filter subbases. The finite intersection property can be used to reformulate topological...

open ditch or covered drains to reduce moisture content in the pavements subbase and subgrade. Wheeled transport created the need for better roads. Generally...

vehicle loads and faster speeds, requiring thicker slabs and deeper subbase. Subbase is the layer or successive layers of stone, gravel and sand supporting...

Set types Amorphous Countable Empty Finite (hereditarily) Filter base subbase Ultrafilter Fuzzy Infinite (Dedekind-infinite) Recursive Singleton Subset ·...

is a totally ordered set, the order topology on X is generated by the subbase of "open rays" { x ∣ a < x } {\displaystyle \{x\mid a<x\}} { x ∣ x < b...

Set types Amorphous Countable Empty Finite (hereditarily) Filter base subbase Ultrafilter Fuzzy Infinite (Dedekind-infinite) Recursive Singleton Subset ·...

which is then laid on the base course, which is normally placed on the subbase, which rests on the subgrade. There are various different types of flexible...

Set types Amorphous Countable Empty Finite (hereditarily) Filter base subbase Ultrafilter Fuzzy Infinite (Dedekind-infinite) Recursive Singleton Subset ·...

History Of Hardcore (1995) (collaboration with Moving Shadow) Subbase Sampler (1996) Classic Subbase (1997) Suburban Base Records (The History of Hardcore, Jungle...

high-performance geogrids at the subgrade and high-performance geocell in the upper subbase/subballast layer has been shown to increase the reinforcement factor greater...

Set types Amorphous Countable Empty Finite (hereditarily) Filter base subbase Ultrafilter Fuzzy Infinite (Dedekind-infinite) Recursive Singleton Subset ·...