# Hilbert–Schmidt operator

> nuclear operator of order 2; a bounded operator A on a Hilbert space H such that tr(A*A) is finite

**Wikidata**: [Q1518047](https://www.wikidata.org/wiki/Q1518047)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hilbert–Schmidt_operator)  
**Source**: https://4ort.xyz/entity/hilbert-schmidt-operator


## References

1. Freebase Data Dumps. 2013