Recent content by aldrinkleys

Hydroxyl bond. There is a short explanation about it in the book but I didn't understand :/ I just found this two web pages about that bond. http://www.springerlink.com/content/k5238l2763156073/ http://www.nature.com/nature/journal/v137/n3467/abs/137617b0.html

hello I read about it in a book but I find anything about in the web. How is it formed and how does it behave?

ah, I solved my problem =)I used Harmonic analysis

Which families of functions should I use to approximate it? I tried f(x) = a + bx + cx^2 + dx^3 + ex^4 + fx^5 + gx^6 a,b,c,d,e,f,g \in R And I got this: but that curve ignores the hole between 50 and 80. and this is important for me and f(x) is too long... Can anyone help me?

:!) I'm so happy! Thank you very much!

What I did: u = x+y so x = u-y y = u-x x \geq 0 y \geq 0 y \leq 1-x u-y \geq 0 \rightarrow u \geq y u-x \geq 0 \rightarrow u \geq x u <= 1 x \in [0,1] y \in [0,1] So u \in [0,1] And I don't know what to do about the integral and the Jacobian, etc :( what to you think about? Ps: OMG, tex...

I tried to it. But I don't know what to do after.

Hello. Can anyone help me, please? R = { (x,y) \in R² | 0 \leq x \leq 1, 0 \leq y\leq 1-x} f is continuous at [0,1] Show that \iint_R f(x+y) dxdy = \int_{[0,1]} u f(u) du

Thanks.

but, look: From Calculus II, Apostol, p 360

What does ye" mean? From here:

Thank you!

Did Fubini's Theorem fail here?

N integer that satisfies I mean, the system has solution with x >0 and y < 0 a) {-2,2} b) {0,1} c) {6,7} d) {-3,-1,2}