Evaluate scalar product and determine the angle between two vectors with Higher Maths Bitesize ...

Vectors are pretty important in the introductory physics course. Here are some tips on using python to teach vectors.

Hylleberg, Engle, Granger, and Yoo (HEGY) (1990) unit root test confirms the presence of non-seasonal unit root and finds no evidence of biannual and annual frequency unit root in the level of series.