por Nguyen D L
•4 de ene. de 2022
I love how Professor Yi introduce me to many ideas in modern physics. I learned to look at problem solving in a whole new way. The Action Principle is so inspiring that I hope would help me in my daily debugging effort at work.
Best regards,
Nguyen Le
por ELMER M P
•11 de sep. de 2022
thank you
por qihan z
•22 de nov. de 2022
very good