Arshiya Gharoony contributed to the SharifiZarchi/Introduction_to_Machine_Learning repository by maintaining and improving course materials, with a focus on the Linear Regression slides. She identified and corrected a LaTeX notation error in the cost function, updating the summation index to accurately reflect the sum over all data points. Her work involved careful validation across the slide deck to ensure mathematical consistency and clarity for students. Utilizing her skills in documentation and technical writing, Arshiya maintained rigorous version control practices, providing clear commit histories. The depth of her contribution lay in enhancing the reliability and accuracy of educational materials through precise technical edits.