# d'Alembert operator

> second-order differential operator that is the Laplace operator of Minkowski space

**Wikidata**: [Q911268](https://www.wikidata.org/wiki/Q911268)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/D'Alembert_operator)  
**Source**: https://4ort.xyz/entity/d-alembert-operator


## References

1. Freebase Data Dumps. 2013
2. ISO 80000-2:2019 Quantities and units — Part 2: Mathematics
3. BabelNet
4. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)