Regarding the direction of the rotation

[seldce]

In a paper, you mention that the direction must be counter clock wise. However image showing direction from head to tail in clockwise. Is there any typo or I made some mistake. It would be great, if you can put some insight on it. Thank you

[Edward-Sun]

Hi, the direction should be counter-clockwise because we follow the definition of complex numbers. The direction in the figure is wrong.