## LSSolve -- Invalid optional parameter or workspace...

Hallo, I have a problem with LSSolve that is quite strange. When I give the command Optimization:-LSSolve( e ); I get the error "invalid optional parameter or workspace size", while if I send the same problem data to the other solvers, ie, as Optimization:-Minimize( e^2 ); or as Optimization:-NLPSolve( e^2 ); it seems to work, despite the fact that the same solution method is used (method = modifiednewton). The problem does also depend on the size of the problem. If e is small and contains only 4 variables it works with all the solvers, but if it contains 6 variables or more LSSolve doesn't.

## set of eqns, howto auto substitute...

Hi all, I'm sort of new to Maple and I got the following problem (just an example): I have 3 equations of the following form: sin(x)=c+d; cos(x)=e+d; tan(x)=e; Now i want to solve the set of eqns to the variable c by automatically substituting d and e. The result should be: c=sin(x)-cos(x)+tan(x) Furthermore it would be very good to know, how to specify which variables should be subsituted and which should remain. I tried variations of eval, subs, algsubs and solve.. Help would be greatly appreciated!

## Dragging expressions to a plot region does not wor...

I have been experiencing the following problem: I define for example the expression x^2 and use the context menu to get a 2D plot then I define another such as 40-x^2 and drag it to the plot region and nothing happens. Has anybody encountered this problem before? Is this a bug with Maple or my computer? Thanks

## row echelon form...

I was given the matrix: A= 1 0 -2 -1 -1 1 1 0 1 1 -3 -2 0 -3 3 3 and told to reduce A to row echelon form using the AddRow function several times. I tried maple's help with no luck. Can anyone help me get started or at least clarify the AddRow function. Thanks, ian

## comparison...

Hello, I would like to know if Maple 11 is like Scientific notebook? Is it easier than Scientific notebook? does anyone know? Thanxs.

## Solve a piecewise funtion...

Hi all, probably a simple question: I have a piecewise function that I want to invert. The actual function is the result of a couple of calculations, but here is a very simple testcase: F1:=y=piecewise(x>=0 and x

## Flux integral over hemisphere...

Hello there, how do I do a flux integral of (3xz,2y,0) over the hemisphere x^2+y^2+z^2=4 with z>=4 with Maple? I've tried to modify the command for 'Sphere' but it didn't work and I'm not sure what the 'Surface' command does since it gives weird results... Thanks very much!!

## How do I create RightOverArrow with subliteral?...

I want to create a Maple symbol consisting of a subliteral with a right arrow over it. If I create the subliteral with the third entry in the Layout Pallette and then use the second entry in the Accents palette to add the RightOverArrow, then I get the message "Error, invalid overscript". Example: Subliteral from Layout Palette, type "V", tab, type "x", Highlight the entire entry and select RightOverArrow from Accents palette, type

## Inequalities...

How do I graph inequalities. A simple example would be graphing y>x-2 where the area above the line y=x-2 would be shaded. What I really want to do however is check my work for the graph of: |x-y|+|x|+|y| where | | is the absolute symbol.

## Is this thing called Interval Math? Can Maple do i...

Is this thing called Interval Math? Can Maple do it? Is this thing called Interval Math? Can Maple do it? I am not about if this is called Interval Analysis. The thing in my mind is that I know my Monte Carlo simulation yields a result with an error tolerance of 1e-5. And I wrap that MC simulation component into a more complicated expression and form a function, I want to know the error bound of the whole function involving the MC component. Can Maple do this? The same applies to analysis about round-off error. If I know a sub-expression has a round-off error of 1e-6, what should the error of the main expression involving this sub-expression be?

## Remove right palette dock only...

how do you remove the right palette dock only

## Trig and Maple 11...

I am using Maple 11 student and am in a trig class. Well we are working on right triangles and are using the six trig functions to solve the triangles. How do I input a sin() etc... and get a correct response. I also need to know how to put a degree mark after the sin(26) number in the parenthesis. I know this sounds simple but I cannot find in the help areas where to do this. I guess I am looking for the DMS characters, degree, Minutes, Seconds. For some reason when I input a sin(), cos(), I do not get a correct response compared to my Ti89 Titanium calculator. and also how do I doe csc, sec, and cot. Do I just input sin^1 etc...?