University student understanding of the gradient of a function of two variables: an approach from the perspective of the theory of semiotic representation registers
- Moreno-Arotzena, O.
- Pombar-Hospitaler, I.
- Barragués, J.I.
ISSN: 1573-0816, 0013-1954
Year of publication: 2021
Volume: 106
Issue: 1
Pages: 65-89
Type: Article