About History:

• Singularity Theory at São Carlos – Brasil- From the beginning up to 1990 
• Singularity group- celebrating 40 years of ICMC-USP-São Carlos

 About singularity theory:

• Singular surfaces 
• Interview with Heisuke Hironaka
• Uma Máquina de Catástrofe Gravitacional

About people of the singularity group and events:  

• International activities  

• Maria Aparecida Ruas's Mathematical Connections

• Professor Loibel

• Farid Tari and Maria Aparecida Soares Ruas (from ICMC singularity group) are also authors of the book (2015) Differential Geometry from a Singularity Theory Viewpoint

• Professor Loibel 1932-2013:
  • Trouxe ao Brasil a Teoria das Singularidades;
  • Professor Loibel - Contribuição Acadêmico - Científica;
  • Mais sobre Professor Loibel.

• Maria Aparecida Soares Ruas - Academia Brasileira de Ciências
  • Membro da ABC;
  • Professora do ICMC na Academia Brasileira de Ciências.

See  Singularities Talks and Youtube Channel of Singularity Group