I cannot find anything in the documentation that could explain the below.

The variable palette only lists the name entered in 1D.

What could explain the difference between 1D and 2D when "?" is used in a name.

Download Questionmark_in_2D_names.mw

I know to ways:

- calling the returned procedure with a value for the independend variable

- printing the procedure with interface(verboseproc=2)

The first requires a procedure and a values that work, the second is quite some typing.

Any other ways?

I did expect the following two plot statements (MaplePrimes is only rendering one statement) to produce the same plot. What did I do wrong when using mod in plot?

Download mod_in_plot.mw

In this post about a non-linear system of equations solutions were sougth. It turned out that there were no non-trivial solutions for the given numerical values. However, with different numerical values there should be solutions.

In analogy to the fundamental theorem of algebra (which clearly states the number of roots),
I wonder if Maple provides commands that can estimate an upper bound of roots/solutions for a system of multivariate equations by analysing the structure of the system of equations rather than attempting to solve it.

I am not sure if rules, methods or theorems exist at all for multivariate problems. Maybe it is a stupid question but for me this was non-trivial for the case given above.

I am looking for something similar to color functions of plot3D. plot.options is directing me to plot,color where I cannot find an example. I tried

plot(floor(x),x=-3..3,color=floor(x))

Error, (in plot) invalid color specification: floor(x)