## How do I put this linear transformation in Maple? ...

Hello, I have a question. The exercise consists of defining the image in relation to a chosen base. For example, I choose {x^4,x^3*y,x^2*y^2,x*y^3,y^4} as a base. Then I want to calculate T(x^4), T(x^3*y),T(x^2*y^2),T(x*y^3),T(y^4) through maple but but maple won't calculate it. Do you know what I'm doing wrong?

## is(EllipticK(1) = infinity)...

I came across this question while trying to verify the equality of expressions containing elliptic integrals.

That's what Maple returns for  However  (1)  (2)

indicate infinity.  (3)  (4) I have no experience with elliptic integrals. Can I assume in this case that infinity is correct?

## How can I fix "Warning, The use of global variable...

 > > > > > >  (1)
 >  (2)
 >  (3)
 >  (4)
 >  (5)
 >  (6)
 >  (7)
 >  (8)
 >  (9)
 >  (10)
 >  (11)
 >  (12)
 >  (13)
 >  (14)
 >  (15)
 >  (16)
 > > > > >  > > ## Maple Calculus Study Guide displays in Maple notat...

I am using the Calculus Study Guide and the mathematical notation is half Maple notation and then half typeset notation. I have tried to tweak with Tools>Options>Display settings but it stays the same

For example:

{a[n]}[n = n]^infinity;, where
"a[n]"

is the general term for the sequence, and
"n"

is the starting index.
The notation is often shortened to {a[n]}; to save printing costs.

...and the math notation past the word "where" is in typeset notation but changed to Maple Notation when I cut and pasted.

## When I plot the function 2/cos(t) using polar coor...

I'd like to plot the graph in polar coordinates of the function r=f(t)=2/cos(t), which should be a vertical line parallel to the y-axis. I've tried it with two different commands, and below you can see the results

plot(2/cos(theta), coords = polar) What is going on here?

I then tried using polarplot from the plots package.

with(plots):

polarplot(2/cos(t), t = 0 .. 2*Pi) Shouldn't the graph be a vertical line at 2?

Notice that if I plot two similar plots

polarplot([1/cos(t), 2/cos(t)], t = 0 .. 2*Pi)

The same result is obtained What is going on here?

## How to sort a list of column vectors based on thei...

`DrawSubgroupLattice(SmallGroup(200, 31), labels = ids)`