Hello, I am given a question in the form f(x)=x^delta sin(1/x) if x does not equal zero,and f(x)=0 if x = 0. the question goes on to say, where delta > 0, we know that f is continous at x=0, but is differentiable at x=o only when delta > 1. it asks me to use maple to provide evidence for this using MAPLE,s graphing features. I am not sure how to input this into MAPLE. Could someone please help? thank's a bunch

how do i determine the derivitive of
y=lnsinx-(1/2sin^2x)

I need to plot about 44 points on an X-Y graph.
All the X coordinates are given (imported from Excel)
as a list. All the Y coordinates are given as a separate list.
For example (roughly this is what the order of magnitudes are
of the X and Y variables)
X:=[380,4000,4067,...,5789]
Y:=[10, 35, 56,...,82]
So plot (380,10) (4000,35) (4067, 56)... (5789,82)
I will worry about curve fitting and all that stuff later.
I would first and foremost like to see Maple understand my
data and plot it.

dear Maple Masters,
i have a plotting problem
about the equation |x|+|y|=5.
the plot shows strange corners of the rectangle,
which is absolutely incorrect
as far as i'm concerned.
am i wrong?
or is this a bug?

Is there a way to evaluate the format of the responses and prevent the grading? In particular I want to provide feedback to students who used a comma instead of a dot in a numerical response. At this moment Maple TA cannot deal with a correct response except for the incorrect format (0,93 instead of 0.93) and evaluates the response as incorrect. There must be a way to prevent students to grade as long as there are comma´s at places where there should be dots.
Harry Garst

Is there a 'search and replace' method to replace all comma´s by dots (as a decimal seperator). For example 0,78 into 0.78. At this moment several students responses were graded as incorrect while the only error they made was to provide a response using a comma instead of a dot. I can export the data file and use another program to score the responses, but there may be a much more efficient method to modify the responses.
Harry Garst

Hi guys,
I need to simplify tedious expressions involving products of fermionic creation/annihilation operators.
I loaded the Physics package,
and defined the fermionic operators c[i,spin] and C[i,spin] where i=1..4, spin=1..2
My first concern is that c[i,spin].c[i,spin] doesn't return 0,
while AntiCommutator(c[i,spin],c[i,spin]) does...
I don't get it.
Although when I apply c[i,spin].c[i,spin] to some ket it does return 0...
I'm a bit lost.
Any idea?

All
I have a simple Alternating Series - that will not come up with a convergent result in Maple 11.
Here is the problem ...
Is ... this alternating series convergent or not ?

sum((-1)^n/ln(n), n = 2 .. infinity)
Application of the Alternating series test says YES ... but Maple does not give a result.
Thanks,

donnie

*
LINK to example file with Alternating Series test showing convergent test to be positive. *
So I get this to calculate correctly:
sum(1/n, n = 2 .. infinity);
And the result is infinity - which is obviously correct.
but the following does not give me a result ...
sum(1/ln(n), n = 2 .. infinity);
what is the trick - do i need to assume something here ?
thanks,
dp

I am solving a constrained maximization problem using the Lagrangian and getting back an empty set of solutions, i.e.:
solns_LSW:=
How do I go about diagnosing why Maple is having difficulty finding solutions?
(Once I know that, I would of course also like to know how, if possible, to change the set-up so that Maple might actually find the solution(s)!)
I can see that the Lagrangian becomes non-concave for cases where lambda2>p (p is one of the variables I am solving for: there are two, s and p -- see attached worksheet).
This would clearly be the case for, say, p=0 optimal (which I have reason to believe it is, based on some numerical simulations I ran).

Dear all,
In the attached file I try to solve expression Y for p.
As Y includes dCS(p)/dp, the solve command produces an error message. I do understand that Y can't be solved for p since expression dCS(p)/dp is not fully defined. However, the result I am aiming for is simply: p = -(1/2)*(dCS(p)/dp) (with p simply being a funtion of dCS(p)/dp)
Which command leads to this result? I haven't found it in the help section.
Many thanks for your help!
Florian

View 5919_Question_solve
Hello everyone,
I was wondering if the grid resolution for "patchedcontour" wireframe 3d plots is adjustable? The only setting I know of is 'numpoints', and I can set that to a high number to get a better looking 3d plot, but this results in a dense amount of wiring for the plot. So I was curious if there is a way of getting the 'better' look for a graph while keeping the number of wires low enough so that contours are easily visible (and usable).
Any takers?
Thanks in advance. :o)

I have been told my code is not 'perfect', I'm not too hot on maple and it has taken me a week to get to this stage. Any help or suggestions would be very welcome!
h:=0.1: k:=0.001: r:=k/h^2:
xl:=0: xr:=1: # left and right ends of interval in x
nxpoints:=round((xr-xl)/h):
ntsteps:=5: # total number of time steps
iprint:=1: # print output every iprint time steps
printf(cat(" x,t ","%7.3f"$(nxpoints+1),"\n"),seq(i*h,i=0..nxpoints)):
format:=cat("%7.3f"$(nxpoints+2),"\n"): # format for printing output
Boundary conditions
for j to ntsteps+1 do
u[0,j]:=0: u[nxpoints,j]:=0

hello all ... peculiar problem here ... please help
the expression is true that 1/n(n+1) = 1/n-1/(n+1)
since 1 = n + 1 - n gives 1/n = (n+1)/n - 1
Is there a way to demonstrate this identity in Maple ? ?
I cant find any trick with "expand" or such that works.
This impact is also seen when evaluating ... the following ...
sum(1/n-1/(n+1), n = 1 .. infinity) = 1;
=
print(`output redirected...`);
i get the proper answer of 1
but no answer with :::

I know maple has two functions max and min to compute
the maximum and minimum of some arguments.
But I have a list,such as l:=[1,2,3];
when I use the maple function min，I need to write: min(l[1],l[2],l[3]);
How can I simplify the expression?
If l is list with too many items,how to use min to calculate the minimum?