Mathematics for Machine Learning, Marc Peter Deisenroth, A. Aldo Faisal, and Cheng Soon Ong, 2020 (Cambridge University Press)DOI: 10.1017/9781108679901 - This book bridges the gap between mathematical foundations and machine learning applications, presenting matrix operations, including scalar multiplication, in an ML-relevant context.
The absolute basics of NumPy, NumPy Developers, 2023NumPy v2.3 Manual - Official documentation for NumPy that demonstrates how to perform basic array operations, including scalar multiplication, efficiently in Python.