“…An onto-semiotic approach considers the nature or meaning of mathematical objects and includes three aspects of mathematics: problem-solving, symbolic language, and organized logical and conceptual systems (Godino, Batanero, & Roa, 2005). The onto-semiotic approach has been used to analyze the obstacles to learning mathematics based on previous research: (1) analyze students' understanding of algebra using the onto-semiotic approach, which focuses on language components, descriptions, procedures, propositions, and arguments (Amin et al, 2018); (2) examine learning obstacles related to sequences and series, with a focus on situation components, descriptions, and procedures (Rachma & Rosjanuardi, 2021); (3) examine students' difficulties with the Pythagorean theorem, focusing on language elements, situations, descriptions, procedures, propositions, and arguments (Rudi, Suryadi, & Rosjanuardi, 2020); (4) analyze the understanding of integration focusing on language components, problems, concepts, procedures, propositions, and arguments (Borji & Font, 2019).…”