Recent content by SallyGreen

Thanks, for the moment let us forget the tangential derivative. I only need to compute this integral by parts ∫dqG0(q,r:k)∂G(q,r′)∂n choosing u=G0(q,r:k) and v=∂G(q,r′)\∂n so du=∂G0(q,r:k)\∂q dv=? where ∂G(q,r′)\∂n= n.\grad(G(q,r′)) so what is the...

Thanks, and what about the tangential derivative. How can I convence my self that is equal to the normal derivative. I need these info to be able to do the following integral by part:: \int dq G_0(q,r:k)\frac{\partial G(q,r')}{\partial n} so this where I want to take the antiderivative of the...

Hi Everyone, please can you tell me why for a circle we have the normal derivative is equal to the tangential derivative, adn what is the antiderivative of a normal derivative? wishes, Sally

can anyone please, help me how to construct a matrix with matrices elements, my main matrix A is constructed of 6 matrices, and I have all the element of these matrices, but the problem I do not know how to write the main matrix A, how the indices look like??

if I define the array like this then how can I refer to the nth term of it which is X(n)?

thanks, yeah I have n=5 not 5.0d0, if I define the array as real*8 X(n) , then how can I refer to the nth term in the array which is X(n) isnit??

Hi there yes they are integers cos I have already changed n to 5 not 5.0d, I mean X(1,n)is correct declaration for an array of n elements?

yes you right, but Is the way I define the array X &Y which contains real numbers correct or no?

Hey there, please anyone could give me a hand your help is greatly appreciated, actually I have written that code, but still giving me an errors, so still struggling as a begginer in Fortran 77, here the code and the errors c * This program reads the five vertices of an irregular Polygon then...

Hi there if the line equation is 5x+6y=8, we can extract the vector as (5,6) is that correct?

Hi there, Many thanks As I need to consider the contribution of the curvature of the boundary of a triangle which is zero on the sides, but what about at the corners? I guss the corner does have a curvature which is infinite curvature, but why have u taken the opposite of the curvature?

thanks, actually I need dim of the arrays to be 5, in the case which I am dealing with now, but I want to write a general code.

Hi guyes I would be highly grateful if you could help me in these questions as I need to build code in Fotran 77 for the first time In fortran 77 what is the difference between write(*, 'ghghfy') and write(9, 'ghghf) Why we do this declaration Parameter (zero=0.0d0, one=1.0d0...

yeah the curvature for the "sharp" edges

does anyone guys advice me how to find the curvature at the corner of a rectangular,, cos I need to find it at any point of such geometry, and the curvature for flat side is just zero, but still sruggling with the corner.... anyone could help...