Hello,

I am using Maple 13 under Linux and cannot seem to plot.  I get a message like

Error, (in plot) type `has_unit` does not exist
 

Furthermore, the Table, Plot, Drawing and Spreadsheet menus are greyed out so I cannot access them.  How can I rectify this?  Are these features disabled for some reason under Linux?

I have to write a program that takes a plain text; that characters are represented on 5 bits. My information vector is of the form W=[a,b,c,d]. the sent vector is of the form C=[x,y,a,z,b,c,d] where x,y,z are parity check elements. I don't know how to get my W

Our previous article described the design of fast algorithms for multiplying and dividing sparse polynomials. We have integrated these algorithms into the expand and divide commands of Maple 14. In this post I want to talk a bit about what you might see when you try Maple 14. Keep in mind that the product isn't released yet and I don't work for Maplesoft, so general disclaimers apply. Nevertheless, one of the first things you may notice is this.

Hey everybody,

I have what seems to me like it should be an incredibly easy question.

In Maple I have a function u(t). What I need to do now is determine the value of t at which u(t) is equal to some already-known value. It seems like it ought to be incredibly easy to do, but I really have no clue how to do this.

Any help would be greatly appreciated!

 

I have Maple 13 that I got with my student license, I am thinking of re-formating my computer, Win7. Do I need to de-authorize Maple first? or what do I do?

how can I write a code in Maple that will take a primitive irreductible polynomial and will output the tables F4, F8, F9 and F16. this is done using Zech's logarithms

 

Hi,

PredictorEstimator := diff(X(t), t) = A.X(t)+B.U+L.(Y-C.X(t)-D.U)

If I want to collect the X(t) in the above non-communative equation, which maple command should I use?

Regards

 

I created two Maple animations in Maple 13 using the command "animate", which I then call with "display". The application works wonderfully. Now I am trying to create a Maplet around this program, and am having trouble finding any information or examples in the Help menu on how to create play buttons and whatever else is needed to successfully make this work. If you could give me some guidance or point me to an example somewhere that would be greatly appreciated.

hello could u help me with this error printf(cat(`$`(`%12.5 f`, 4)), `$`(vij(1, 1)[k], k = 1 .. 4)) Error, (in fprintf) unknown format code ` ` THANKS

r''-r(phi'^2+sin(phi)^2 theta'^2) -e^-r^2 = 0

Do you have any idea how to solve that ode?

I tried the following:

q:=(x)^(2)=a;
assume(0<x,0<a);
solve(q,x);
 

and received two solutions, though I assumed x and a to be positive.

Why? And what can I do, to make Maple account for my assumptions and only return the one possible solution?

I was doing a procedure for my programming class that classifies triangles.

I got the error "invalid terms in product"

I was wondering if anyone knew what that error means? I emailed my professor but he hasn't emailed me back.

 

Thanks,

Lex

Hello, everyone.

Here is a simple question.

How can I solve an equation containing a logarithmic function, for example:
eq:={40=53802.8616296/V-4421522.681759509154376431238971030890884/V^2-34696412.12593013477367899170424836286055/V^3-68770455564.45999796126160810938763183857/V^4+403332559275.4141930212434442368214769780/V^5+958128028485.0130104382506076504882209562/V^6-26140204752481.13476652750626233649550628/V^7+17375263330.60863159106251286006887257238*ln(V)/V^4,1258*0.9<V<1258*1.1}

 

I have a set of PDEs & I tried to solve it. First of all I defined some functions as:
H := (diff(a(t, y), t))/a(t, y), Hy := (diff(a(t, y), y))/a(t, y), H1 := diff(H(t, y), t), a1 := diff(a(t, y), t), a2 := diff(a1, t), Hy1 := diff(Hy(t, y), y), ay1 := diff(a(t, y), y), ay2 := diff(ay1, y), n1 := diff(n(t, y), t), n2 := diff(n1, t), ny1 := diff(n(t, y), y), ny2 := diff(ny1, y), pef := -2*n(t, y)^2*Hy1-3*n(t, y)^2*Hy^2-n(t, y)*ny2-2*n(t, y)*Hy*ny1-2*H(t, y)*n1/n(t, y), `ρef` := 3*n(t, y)^2*Hy1+6*n(t, y)^2*Hy^2, `ωef` := pef/`ρef`,