questions are not the point. the most important thing is how you solved the question and how well you settled it.

you'd better not do that
1, you may screw up your relationship with your sup who is an important network for you
2, without your sup's name in your paper, it's not easy to have it published, even published, not easy to be accepted.

research is about error and trial, it's natural

dont lose heart, a little shade cannot overshadow your brilliance

good job

it's not easy to get the support from your current department and university. and the reason you quit is not convincing, i dont mean it's not true that you dont have interests on the current subject.

think it over before you make decision

work hard and practice more

it seems the hot debate is kind of far away from the point

I keep all the records of the papers i read, but not well organized, using endnote is a good way, thank you for your suggestion

Give what he or she likes or want to have very much.

For me, I do work at daytime and totally concentrated. After office hours, I will take a change by watching tv and listening to some music. then i will go on working at home till mid-night.

To be honest, I always time is not enough for me, but we are human beings who have to rest. work hard and play hard.

that's true, common sense

i start from scratch as to my subject from Oct.1st, At the first month, I did nothing but try to settle in the new environment, i concentrate on my paper review from last week, now I read a world of papers. Bit by bit I get the hang of this subject from fundamentals theory to the specific problems. I think it would be not difficult as long as you work hard on it, but it does take a lot of your time and energy that otherwise you can hang out with your friends or go to travel.

come on, guy, you just start your phd, if you know everything ,you dont need this degree any more.

it's a test of true love if either you or your partner is doing phd. i totally agree on this point.