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・ Topological quantum number
・ Topological rigidity
・ Topological ring
・ Topological semigroup
・ Topological skeleton
・ Topological sorting
・ Topological space
・ Topological string theory
・ Topological tensor product
・ Topological vector space
・ Topologically Associating Domain
・ Topologically Integrated Geographic Encoding and Referencing
・ Topologically stratified space
・ Topologika
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Topologist's sine curve
・ Topology
・ Topology (album)
・ Topology (chemistry)
・ Topology (disambiguation)
・ Topology (electrical circuits)
・ Topology (journal)
・ Topology (musical ensemble)
・ Topology and its Applications
・ Topology control
・ Topology dissemination based on reverse-path forwarding
・ Topology of uniform convergence
・ Topology optimization
・ Topology table
・ Topolovac


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Topologist's sine curve : ウィキペディア英語版
Topologist's sine curve
In the branch of mathematics known as topology, the topologist's sine curve is a topological space with several interesting properties that make it an important textbook example.
It can be defined as the graph of the function sin(1/''x'') on the half-open interval (0, 1], together with the origin, under the topology induced from the Euclidean plane:
: T = \left\ \right ) : x \in (0,1] \right\} \cup \.
==Image of the curve==

As ''x'' approaches zero from the right, the magnitude of the rate of change of 1/''x'' increases. This is why the frequency of the sine wave increases as one moves to the left in the graph.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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