i can't edit so i have to reply instead: for anyone interested these two explanations i found when googling around again today are very good: https://www.yout

i can't edit so i have to reply instead: for anyone interested these two explanations i found when googling around again today are very good: https://www.youtube.com/watch?v=omrnRshzHhw https://www.youtube.com/watch?v=omrnRshzHhw https://www.youtube.com/watch?v=vKjbau2Hlrs https://www.youtube.com/watch?v=vKjbau2Hlrs