[數撚圍爐區] abc conjecture is still a conjecture (3)

當年讀到WOW WOW聲，一開波問鋪棋盤都O咗嘴
最後淨係學識pigeonhole principle

x+y=7
3x+y=3

唸左好耐
功課最後一題

多謝巴打

其實complex number 當唔當scalar

做咩咁執着
C is a 1 dim vector space over C
C is a 2 dim vector space over R

即刻諗通咗

點解啲數學佬唔整個符號俾basis

咩符號

on the other hand, C is a field

Column space of A 可以寫Col(A)
Null Space 可以寫Nul(A)

但basis就冇 次次都要寫A basis of A =

因為basis is not unique

Because basis for a vector space is not unique.

比你追秒

原來係因為咁

Real vector space 可以 complexified 做 complex vector space

咁啱入黎