# On universal operators and universal pairs

## TL;DR

This paper explores the fundamental properties of universal operators on Hilbert spaces, introduces new examples of such operators and pairs, and enhances understanding of their structure and behavior.

## Contribution

It provides new examples of universal operators and pairs, expanding the known classes and deepening the theoretical understanding of their properties.

## Key findings

- New examples of universal operators introduced
- Characterization of properties of universal pairs
- Enhanced theoretical framework for universal operators

## Abstract

We study some basic properties of the class of universal operators on Hilbert space, and provide new examples of universal operators and universal pairs.