De Matos Gondim, Diego [UNESP]2021-06-252021-06-252020-12-01Bolema - Mathematics Education Bulletin, v. 64, n. 68, p. 1077-1104, 2020.1980-44150103-636Xhttp://hdl.handle.net/11449/206410With the objective of operating the fieldwork as a possibility of an affection research in/for/with Ethnomathematics, two experiments are performed in different research groups, namely: The anthropological-therapeutic experience of anthropologist Jeanne Favret-Saada, in a witchcraft community in Bocage, western France; and the cartographic experience of the author in a remaining community of quilombolas in the state of São Paulo. To affirm the invention of a body that slides between research and field, at least three types of devir are presented as an expression of their potency: To become a sorceress; to become a mandira; and to become a child. It is understood that all the experiences composed of the types of devir presented, express the fieldwork in/for/with Ethnomathematics as a possibility of an affection research.1077-1104por(Mathematics) EducationCartographyEthnomathematicsPhilosophy of DifferenceArtigo10.1590/1980-4415v34n68a122-s2.0-85106800565