## Loser66 one year ago @GIL-ojei

1. Loser66

@GIL.ojei

2. Loser66

example, right?

3. anonymous

yes

4. Loser66

$$x \in R^n$$, they define $$\vec x =(x_1, x_2)$$ and by definition above $$\vec x \in R^n$$ must have n-tuples, that is $$\vec x =(x_1,x_2,......,x_n)$$ so that if it stops at $$x_2$$, then the tuples after it will repeat $$x_2$$ in n-1 times. Why n-1? because you have $$x_1$$ there.

5. carolinar7

Hello

6. Loser66

Like in $$\mathbb R^3$$, $$vec x =(x_1,x_2,x_3)$$ , in topology, if they say $$\vec x=(x_1,x_2)$$ $$\in \mathbb R^3$$, that is $$vec x=(x_1,x_2,x_2)$$, hence $$x_2$$ repeats n-1 =3-1=2 times. Got that part??

7. anonymous

sir, why did x2 repeat twice?

8. Loser66

They define it that way!! like your parents "define" you are GIL.

9. Loser66

so that everybody will call you GIL. That is it.

10. anonymous

is it from the definition x(x1,x2) den because it is not up R^3

11. anonymous

which ought to be (x1,x2,x3)?

12. Loser66

Actually, this book is not good. If it is written in other language, I have no comments. But it is written in English, but they changed tuple to topple; scalar to sealar. At the first read, I didn't understand what it means. ha!!

13. anonymous

sir please have pity on my and help me out or if you have any self teachable book, you can help with , please do. it means i have to understand this before understanding matric and topological space

14. Loser66

Anyway, it is just the way they define the operator. it is not important because it doesn't apply to any other problem.

15. Loser66

Again, it is not matric!! it is metric.

16. anonymous

ok sir

17. Loser66

One more thing!! I didn't take topology yet!!. My friends warned me not to take that course. It is so confused and apply to nowhere.

18. anonymous

hahahahahahaah. but it is a call course for me . i have to learn it . ok can you take me metric space?

19. Loser66

To the topic I never know before, I can make a SHORT research to know what it is. Don't forget, SHORT, not long.

20. anonymous

ok but can you open to page 14 of the book, under remark ,,,, i dont get a thing there