## 861 Reputation

10 years, 258 days

## Canvas...

One way is to insert a canvas (see menu Insert->Drawing) and use the basic elements and shapes to build the image. I would prefer to import the circuit into Maple as externally created image.

## k=0->infinity...

I guess you have to avoid the case k=0

I0 := 1/sqrt(1 - k*cos(t))^3;
(int(I0, t = 0 .. 2*Pi) assuming (-1 < k, k < 0));
(int(I0, t = 0 .. 2*Pi) assuming (0 < k, k <1));

## function sequence...

add a step size to seq:

f := unapply(3*x^2 - 2*x^3 - 1.0806746490*x^2*(x - 1)^2 - 0.8118769171*x^2*(x - 1)^3 + 0.4147046974*x^2*(x - 1)^4 + 0.4585681954*x^2*(x - 1)^5, x);

seq(f(x), x = 0 .. 1, 0.1);

## Code Edit Region...

Just insert a code edit region into your document, incl. syntax highlighting, parenthesis matching etc.

see ?codeeditregion

## Iterators...

There is the Iterator package as well, with alot of functionality regarding partitions. Check it out.

P := Iterator:-Partition(5):

for p in P do
printf("%d\n", p[1 .. length(P)]);
end do;

Have you updated to Maple 2019.2.1 for better campatibility with Catalina?

Updating from inside Maple is often slow.

## cat or...

for instance:

i := x;j := p;

`||`(i, j);

cat(i, j);

try

collect(Ty4, exp);

To see what combine is limited to do, check ?combine,exp

## Contact Support...

Obviously, your Maple is broken. Contact Maple Customer Support and don't forget to include your Purcase Code you used to activate Maple, because it helps to identify the source of your license. You are not the first one with this error pattern.

support@maplesoft.com

## view option...

Play with the options

plot3d(sech(1/2*sqrt(3/5)*(x - 2*t)), x = -10 .. 10, t = -10 .. 10, scaling = constrained, style = patchnogrid, view = [-10 .. 10, -10 .. 10, 0. .. 2.0], tickmarks = [default, default, [0., 1.0, 2.0]]);

## ImplicitDiff...

Afaik there is no diff tutor for implicit functions. But you could raise printlevel a bit to see what Maple is doing when the command implicitdiff is invoked.

printlevel := 20;
implicitdiff(z*t = cos(z + t), z, t);
printlevel:=1; # reset

## use assume...

You have to place an assumption on a to determine the limit.

V := D__e*(1 - exp(-a*(R - R__e)))^2;

limit(V,R=infinity) assuming a>0;

## Technical Support...

You should contact Maplesoft support, don't forget to include your 16 digit purchase code.

support@maplesoft.com

## Dynamic Systems...

You could as well use the library routine for transfer functions

restart;
with(DynamicSystems);
eq1 := 2*diff(y__1(t), t) = -2*y__1(t) - 3*y__2(t) + 2*u__1(t);
eq2 := diff(y__2(t), t) = 4*y__1(t) - 6*y__2(t) + 2*u__1(t) + 4*u__2(t);
T := TransferFunction([eq1, eq2], [u__1(t), u__2(t)], [y__1(t), y__2(t)]):
PrintSystem(T);

## Degrees in Maple...

There is no switch in Maple to do calculations in Degrees, but you could write a tiny procedure:

f := proc(amp, phase) amp*exp(Pi/180*I*phase); end proc;
#Call f with amplitude and degree:
evalf(f(230, 0) - f(20, -30)*f(0.097, 7.2) + f(40, -120)*f(0.097, 7.2));

#If you want to have it in polar coordinates again:
polar(%);

#You still would need to convert the rad to degree:
op(2,%)*180/Pi;

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