Hi:

I am using Maple + MySql and can execute queries like this:

nZero:=10^(-6);

ee:=7*u+6*v-2*w; 

ss:=convert(ee,string):

sql:=sprintf("SELECT n FROM centers WHERE  ABS(%s)<%a ", ss, nZero ):

Problems arise when ee contains `^` operator, because MySql does not understand this operator, but the function POWER() , ie, in MySql x^y must be written as POWER(x,y).

Example 

I have had to use Maple 17 once in the past and I have to use it for a problem in Calculus.  This problem, I have been trying to figure out how to type it in correctly to get the answer.  I know the answer since its in back of the book.  Here is the explanation w/ the problem:

"Use a computer algebra system to differentiate the function"(She wants us to use Maple.)

f(x)=((x^2-x-3)/(x^2+1))*(x^2+x+1)

in word terms, f(x)= (x squared,-x,-3)/(x squared, plus 1) ...

I want to find the values of the following expressions, S, c3, c4,c5, cv, phi_3,phi_4,phi_5, c_3k,c_4k,c_5k,c_5b,G and B for given parameter values:  alpha,beta,g,k,b,sigma

(Note that cv is a function of c_3,c_4.c_5, so are the phi's and G)

1. S = (1-alpha)*((1-beta)*A*g*k^(g-1)-beta*(k+b)*A*(g-1)*g*k^(g-2))
2. c_3 = (1-alpha)*A*(1-g)*k^g
3. c_4 = (1-alpha)*(1-beta)*A*g*k^(g-1)
4. c_5 = -(1-alpha)*b*(A*g*k^(g-1)-1)

Replace each letter in the following sum by a digit from to , in such a way that the sum is correct.

A student exercise: It starts with a defintion D1 := 1.500*Unit('m') and ends (after some calculations) with the following expression:

(0.1250000000e-3*(.6000000000*Unit('m')+.6510936027*(Unit('m'))(.2929921212*Unit('m'))/(Unit('m')*((1/2)*Pi-26.38779995))))*Pi^2*Unit('m')^2*((1/2)*Pi-26.38779995)

I would like to simplify it to get -0.0175 m^3, but I get the following error when I try to simplify the units: Error, (in Units:-Standard:-+) the units...

Good afternoon Professor

I would like to know the Maple approach to explain my students with regard to

animation of the solids of revolution which arise in Applications of double & triple integrals.

I request you to help me in this regard.

with thanks & regards

M.Anand

Suppose I have have two matrices A[i,j] and B[i,j]. I want to find prodcts of the form A[i,j]*B[i,j] for all values of i and j and then sum of all the products. Any help would be highly appreciated.

M. Yaseen

Let z be a complex number and p your conjugate. how to solve the equation

(2z-3)(-3p+4)-(2p-3)(-3z+4)=0   with maple?

Hi! I was wondering if anyone knows of a way to taylor expand an expression around a function. For example, let's say I have an expression like

expression := diff(f(r), r$2) + exp(-f(r))*(1 - g(r))^2

and I want this expression to be linear order in f and g. If I try

mtaylor(expression, [f(r), g(r)], 2)

I get an error. I don't want to replace f(r) with just f (for example) because then all of the derivative terms vanish, and I want this to also be of linear order. 

non-linear and non homogen equation second-order..

1.) y"+y^2 = x^4 + 2

with 0<x<1, y(0)=0, y(1)=1

2.) y"+y^2 = -b*y^2 * y'

with y(0)=1, y'(0)=0 and b=0.1 ; 0.3 ; 0.5 ; 0.7

how to solve thats??

thanks in advance.

Good afternoon Professor.

I am M.Anand working for SRIIT, as Assistant Professor in Mathematics in Hyderabad, INDIA.

I request you to help me How to write c-programming codes to solve the linear system by using Gaussian elimination, conjugate gradient method without preconditioning and Conjugate gradient method with preconditioning?

With thanks & regards.

M.Anand

Assistant professor in Mathematics

Hi everyone. Long time reader, first time poster.

I have a rather nasty function that I need to use in various calculations (namely, one of them is a numerical integration). But, even evaluating this function at a given point takes exceedingly long (several seconds to tens, maybe even hundreds of seconds!). Is there any way I can make maple do all of the calculations numerically instead of doing all but the last evalf symbolically? I think that may be the problem. Anyway, here is my defined function:

Hi, Everybody:

It is possible to fin this result with Maple:

Factor[18*R*r - 3*s^2 + 9*r^2] - >  3*(3*r^2 + 6*r*R - s^2)

i.e. factoring at least integers terms?

Thanks in advance

C.L. 

Hello,

I need to model universal joint and spherical joint with spring elements.

Contrary to the revolute joint where there is an option to put spring element, i don't find this option in the universal joint and the spherical joint. So is there a simple solution to model spring in this kind of joint.

I hope that i shouln't have to build the joint with several revolute joint in serial.

Thank you for your help.

next_fib.mw

I want to find the next fib number in the sequence given an input number.

I know there are previous posts using a recurance formula...i don't want to do that.

I want my code to work like the nextprime command. but i have problems..

If the number i/p is not a fib no. .....error.  it needs to find the next actual fib no.

there is also the problem that because the...