Counterpedia · Subject

Wikidata observation

fast Fourier transform

𝑂(𝑁 log 𝑁) divide‐and‐conquer algorithm to calculate the discrete Fourier transforms

Also known as (2)

fast Fourier transformation · FFT

Observations from Wikidata; separate from governed Counterpedia records. Sources, origins and what has been checked

At a glance

Selected recorded observations. Counterpedia has not independently verified them; inspect the statements for sources and alternative or historical context.

subclass of: discrete Fourier transform
About this property
A broader class whose members include every member of this class. This is different from an individual being an instance of a class.
Wikidata property P279; Statement & references
named after: Joseph Fourier
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P138; Statement & references

How these facts are selected

Up to eight distinct properties with readable names and values. One from each available category comes first, then remaining slots follow property category, property code and source order. This keeps names and family details from crowding out work, dates and geography. Media, external identifiers, unnamed targets and statements with incomplete qualifying context stay in the detailed list. The same rule applies to every subject. Context recorded by Wikidata appears beside each selected fact.

Relationships

Outgoing connections are statements about this subject. A connection is not evidence that another subject supports a claim.

subclass of (P279): discrete Fourier transform
Relationship name unavailable: John Tukey
Relationship name unavailable: inverse fast Fourier transformation
named after (P138): Joseph Fourier
Relationship name unavailable: sine wave
Relationship name unavailable: WikiProject Mathematics
Relationship name unavailable: twiddle factor
topic’s main category (P910): Category:Fast Fourier transforms
subclass of (P279): algorithm

All projected connections & provider records

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fast Fourier transform

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Identity & relations

discrete Fourier transform— subclass of (P279)stated relationship
algorithm— subclass of (P279)stated relationship

Other connections

John Tukey— P178stated relationship
inverse fast Fourier transformation— P461stated relationship
Joseph Fourier— named after (P138)stated relationship
sine wave— P1478stated relationship
WikiProject Mathematics— P6104stated relationship
twiddle factor— P2283stated relationship

External identifiers

Category:Fast Fourier transforms— topic’s main category (P910)stated relationship

The original records this observation was assembled from, off Counterpedia.

Wikidata: Q623950 ↗

Keep exploring the surrounding neighborhood.

Explore the fast Fourier transform neighborhood

Assembled from entry read model wikimedia_observation:Q623950, public release sha256:f33228901a35b0683356002a46df9ceb11f399d05f17abb5c7c78256cbf38ba7. This view is served from published release bytes.

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External identifiers (23)

Identifier lookup links, separate from statement references.

P10565: 67251
P12946: Fast+Fourier+Transform
P6900: 高速フーリエ変換
P10283: C75172450
Encyclopædia Britannica: topic/fast-Fourier-transform
P7293: 9810649236205606
P9100: fft
P5106: fastFourierTransform
P10017: fft
P10017: fast-fourier-transform
P10037: fft
P14541: 46WUrf
P9100: fast-fourier-transform
P1296: 0247528
P3365: fft
P12385: transformada-rapida-de-fourier
P3417: Fast-Fourier-Transform-FFT
P646: /m/031v0
GND: 4136070-9 ↗
P5106: fft
P6706: FFT
P6366: 75172450
P2812: FastFourierTransform

Sources and origins

Structured observations: Statements in this view were observed in Wikidata. Their source identifiers and carried history remain available for inspection.
Cited references: Works, URLs and identifiers attached to particular statements. A cited locator is not an independently established support finding. Inspect statement references
Retained evidence: This view carries observation data. It does not supply independently captured copies of the cited documents or establish their custody. Discovering a reference does not register a governed Source Record.
Checks: No completed Check is associated with these statements in this view. Check execution is currently unavailable.

These observations are not governed Counterpedia claims. The origin of an observation can differ from the author or publisher of its cited source.

Validation state

1. In Wikidata
No source identifiers recorded.
2. Lookup route
No source identifiers recorded.
3. Lookup result
No lookup recorded for this page.
4. Saved copy
No saved copy for this page.
5. Fixed version
No fixed source version for this page.
6. Check result
Not checked.

These stages describe what this page can show from governed subject-scoped records. A lookup route does not mean a source was found; a lookup result does not mean bytes were saved; and a saved copy does not mean a fixed source version or a Check result exists.

Research frontier

Ready to investigate

None of the recorded identifier routes is marked routable.

Still unresolved

23 identifier routes and 0 reference hints remain research inputs rather than governed evidence.

Authority boundary

What this page establishes

It establishes what the retained Wikimedia observation contains and what investigation paths Counterpedia can describe from that material.

What it does not establish

A Wikidata statement is not automatically Counterpedia evidence.
A routable identifier is not a captured source.
A captured representation is not automatically a fixed source version.
A fixed source version is not automatically a Check result.
Graph proximity and reference counts are not support or corroboration.
A provider observation and candidate locator do not establish source bytes or support.

Presentation contract

Stage template: counterpedia.reader.profile.v1
Counterpedia composition: counterpedia.product.subject.profile.v1

Statements & recorded references

Open a statement to see the references attached to it. Context can limit when, where or how a statement applies. Recorded source URLs, identifier resolvers and source works describe where Wikidata points; none establishes source support or a completed Check.

Check execution is unavailable in this preview. Exact recorded locators remain available to inspect and open.

subclass of: discrete Fourier transformReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
A broader class whose members include every member of this class. This is different from an individual being an instance of a class.
Wikidata property P279
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P279",
  "targetRef": "Q2878",
  "targetLabel": "discrete Fourier transform"
}
```
Relationship name unavailable: TFR (fr)Reference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1813
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1813",
  "literalValue": {
    "language": "fr",
    "text": "TFR"
  }
}
```
Relationship name unavailable: https://cs.stackexchange.com/tags/fast-fourier-transformReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1482
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1482",
  "literalValue": "https://cs.stackexchange.com/tags/fast-fourier-transform"
}
```
Relationship name unavailable: John TukeyReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P178
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P178",
  "targetRef": "Q382207",
  "targetLabel": "John Tukey"
}
```
Relationship name unavailable: inverse fast Fourier transformationReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P461
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P461",
  "targetRef": "Q1653494",
  "targetLabel": "inverse fast Fourier transformation"
}
```
named after: Joseph FourierReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P138
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P138",
  "targetRef": "Q8772",
  "targetLabel": "Joseph Fourier"
}
```
Relationship name unavailable: https://electronics.stackexchange.com/tags/fftReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1482
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1482",
  "literalValue": "https://electronics.stackexchange.com/tags/fft"
}
```
Relationship name unavailable: discrete Fourier transformReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P2159
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2159",
  "targetRef": "Q2878",
  "targetLabel": "discrete Fourier transform"
}
```
Relationship name unavailable: https://stackoverflow.com/tags/fftReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1482
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1482",
  "literalValue": "https://stackoverflow.com/tags/fft"
}
```
Relationship name unavailable: sine waveReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1478
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1478",
  "targetRef": "Q207527",
  "targetLabel": "sine wave"
}
```
Relationship name unavailable: WikiProject MathematicsReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P6104
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P6104",
  "targetRef": "Q8487137",
  "targetLabel": "WikiProject Mathematics"
}
```
Relationship name unavailable: John TukeyReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P61
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P61",
  "targetRef": "Q382207",
  "targetLabel": "John Tukey"
}
```
Relationship name unavailable: twiddle factorReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P2283
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P2283",
  "targetRef": "Q7857913",
  "targetLabel": "twiddle factor"
}
```
Relationship name unavailable: FFT (en)Reference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1813
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1813",
  "literalValue": {
    "language": "en",
    "text": "FFT"
  }
}
```
topic’s main category: Category:Fast Fourier transformsReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P910
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P910",
  "targetRef": "Q72287460",
  "targetLabel": "Category:Fast Fourier transforms"
}
```
subclass of: algorithmReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
A broader class whose members include every member of this class. This is different from an individual being an instance of a class.
Wikidata property P279
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P279",
  "targetRef": "Q8366",
  "targetLabel": "algorithm"
}
```
Relationship name unavailable: https://bioacoustics.stackexchange.com/tags/fftReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1482
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1482",
  "literalValue": "https://bioacoustics.stackexchange.com/tags/fft"
}
```
Relationship name unavailable: DIT-FFT-butterfly.svgReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P5555
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P5555",
  "literalValue": "DIT-FFT-butterfly.svg"
}
```
Relationship name unavailable: БПФ (ru)Reference count not carriedRecorded context: Relationship name unavailable: BPF; Relationship name unavailable: BPFThis statement has context that cannot be fully shown here. An unresolved name or missing qualification can change how it should be understood.
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1813
No exact source locator is carried for this statement in this view.
Qualifiers
Relationship name unavailable: BPF
Relationship name unavailable: BPF
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1813",
  "literalValue": {
    "language": "ru",
    "text": "БПФ"
  },
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Relationship name unavailable: https://photo.stackexchange.com/tags/fftReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1482
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1482",
  "literalValue": "https://photo.stackexchange.com/tags/fft"
}
```
Commons category: FFTReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
This names the relationship or attribute recorded by Wikidata. Any context shown beside it qualifies this particular statement.
Wikidata property P373
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P373",
  "literalValue": "FFT"
}
```
Relationship name unavailable: https://dsp.stackexchange.com/tags/fftReference count not carried
Observation origin: Wikidata. References below are citations attached to this statement, not independently captured evidence.
About this property
The readable name for this property is unavailable here. Its code and exact recorded value are preserved; the code alone does not explain the relationship.
Wikidata property P1482
No exact source locator is carried for this statement in this view.
Statement identity, reference hashes and carried detail
```
{
  "predicate": "P1482",
  "literalValue": "https://dsp.stackexchange.com/tags/fft"
}
```

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Data and provenance

Wikidata entity IDs are external identifiers, not Counterpedia canonical subject identities. Rendering this page does not mint a governed identity. Release identities and artifact hashes identify the data used for this view; none establishes verification.

Provenance rows: 49
Acquisition repository: thelaplage/counterpedia-acquisition
Acquisition revision: e6add6a4d8e1668a9ac486407e52974724563ce1, 891f24c5cca64aa69b1dc1b2150e991b940171b0
Provider identity · Observation origin: Wikidata · External entity ID: Q623950 on Wikidata ↗
Served release: sha256:f33228901a35b0683356002a46df9ceb11f399d05f17abb5c7c78256cbf38ba7

No exact claim–source–Check association has been supplied to this page. Recorded references do not establish verification.

graph_membership != truth
graph_edge != support
repeated_identifier != independent_corroboration
projection != admission
Serving a published subset: joined entities + 1-hop neighborhood of 35,994 exact Wikipedia–Wikidata title matches.

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      "output_file": "wikipedia_wikidata_links.ndjson",
      "row_index": 10917,
      "snapshot_id": "wikimedia-demo-join0@2026-08-28"
    }
  }
]

Classification identities

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Wikidata content CC0; Wikipedia titles CC BY-SA — attribution.