Network Spectral Graph Theory (SGT Network) is a group of researchers from several Brazilian educational institutions coordinated by Professor Nair de Abreu and its vice coordinator Professor Maria Aguieiras. It is linked to the research line Modeling and Optimization of PEP, with the objective of developing themes in the area of ​​Spectral Graph Theory, with emphasis on Structural Graph Properties, Combinatory Optimization, Network Connectivity and Vulnerability, Network Centrality Measures, M Graphs - integral, among others.

The SGT Network has consolidated scientific ties with groups of researchers from Portugal, Chile, the United States, Canada, Argentina, Serbia, with an expressive number of joint publications in international journals and the holding of international congresses in Rio de Janeiro with the participation of researchers consecrated in the area.