Construct · 1 fields · 1 citations

annulus: a standalone construct

One name. One construct. A landmark on the map.

● anchor · a standalone construct Nearest construct by meaning·not indexed
annulus1 CONSTRUCTAnnular regionCONCENTRIC · REGION

A single standalone construct; nearby constructs are located against it in the Collider. Tap a field for its definition, unit, and measures.

Mathematics

The region between two concentric circles

In mathematics an annulus is the ring-shaped region of the plane lying between two concentric circles, the set of points whose distance from a fixed centre falls between an inner and an outer radius. It is the natural domain on which a Laurent series converges, so the annulus is where complex functions with an isolated singularity are expanded and their residues read off. Ahlfors's Complex analysis develops Laurent expansions on exactly such regions. The referent is a planar region defined by two radii, unrelated to a mushroom's ring or a spinal disc beyond the shared ring shape.[1]

Unit
The planar region between an inner and an outer radius about a centre
Recovery means
Not applicable
Measured by
Specified by its centre and its inner and outer radii, which fix its area and the Laurent series it supports

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Nearby constructs

veil2 fields · 2 citationsjingle · one word, two constructsbeing3 fields · 3 citationsjingle · one word, three constructsbody2 fields · 3 citationsjingle · one word, two constructs

References

  1. Ahlfors, L. V. (1979). Complex analysis: An introduction to the theory of analytic functions of one complex variable (3rd ed.). McGraw-Hill. ISBN 9780070006577

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