Araújo, J.A. 2020. Applications of elements of catastrophe theory to the study of the (re) production of urban space: part 1 - as Henri Lefebvre brought René Thom to the debate. Revista do Departamento de Geografia. 39, (Jun. 2020), 14–24. DOI:https://doi.org/10.11606/rdg.v39i0.157576.