# resolvent set

> complement of the spectrum; for an operator T, values λ such that T − λ is invertible

**Wikidata**: [Q7315720](https://www.wikidata.org/wiki/Q7315720)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Resolvent_set)  
**Source**: https://4ort.xyz/entity/resolvent-set