Recent content by drc4rd1n

May I know, what books you are using? :cool: I've been used 'Fundamentals of Mathematical Analysis' 2nd Ed by [SIZE="3"]Rod Haggarty & 'A Friendly Intro to Analaysis Single and Multivariable' by [SIZE="3"]Witold A.J Kosmala These two books are just nice :smile:

Hello there, I am interested to join into this great discussion (about: Real Analaysis) !:wink: I heard that this particular field (Real Analysis) is the toughest field in [SIZE="3"]Pure Mathematics. Isn't?

all functions anda curves considered here are assumed to be of class at least C3. If x(s) is a regular curve parametrized by arc length s, then t:(a,b)-> R3 defined a curve on S2.. this curve might not be regular and is called the tangent spherical image of x. the normal spherical image...

Helo..i have a problem about geometry.. How to show that the normal spherical image of x is never constant?

orait.thanks!

helo.. We know that 1+1 = 2. but try this out..there is some dummy things goes around here Firstly, we denote 1 + 1 = 1 + \sqrt{1} <=> 1 + \sqrt{(-1)(-1)} <=> 1 + \sqrt{-1}\sqrt{-1} <=> 1 + i*i <=> 1 + (-1) <=> 0 ?? how come 1+1=0 ? and where is the...