# pseudo-differential operator

> operator on functions, defined by the composition of Fourier transformation, multiplication with a certain smooth function of both position and momentum, and inverse Fourier transformation

**Wikidata**: [Q1644451](https://www.wikidata.org/wiki/Q1644451)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Pseudo-differential_operator)  
**Source**: https://4ort.xyz/entity/pseudo-differential-operator


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=25022)
3. Freebase Data Dumps. 2013
4. Integrated Authority File
5. [Source](https://www.mat.uc.cl/archivos/seminarios/seminario-de-teoria-espectral-246-teoria-espectral-de-hamiltonianos-cuanticos-ii.pdf)
6. [Source](http://archives.umc.edu.dz/bitstream/handle/123456789/8853/LEK6900.pdf)
7. [Source](http://old.math.nsc.ru/~wwwdyat/MLA/part1.pdf)
8. National Library of Israel Names and Subjects Authority File
9. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)