it looks like I’m gonna keep following posting about 2 things : CFD and abstract algebra when I’ve done “my homework”  .Especially for the 2nd one there maybe categories about Galois theory most of them in an arbitrary order , but i might release a chain of post with evolutionary results , so if someone reads this (tutorial)-chain , might begin with Galois#1 , and follows until the last Galois#n , will have a clue of Galois theory .Of course Galois#n will probably be the great theorem of Galois …