## 270 Reputation

12 years, 63 days

## A problem with Grid:-Seq('f(i)', i = 1 ....

Maple 17

Code was computed on two different PC:
1) Win 8.1, Maple 17.02 x64
2) Win 8.1, Maple 18.01 x64

In brief:

`n:=3: Grid:-Seq('f(i)', i = 1 .. n): `

works well in Maple 17.02 but gives an error in Maple 18.01. Why?

However,

`(j -> Grid:-Seq('f(i)', i = 1 .. j))(n):`

works well for both Maple versions.

according to examples from Maple help page
http://www.maplesoft.com/support/help/Maple/view.aspx?path=Grid%2fSeq
we have to pass exactly 'f(i)' (not just f(i)) into Grid:-Seq(...). Why?

Why doesn't Digits:=30: work properly for Grid:-Seq(...)?

For details see attached file. Output was produced in Maple 17.02. In Maple 18.01 the output will differ.

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 (1)
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 (2)
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 (3)
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## Specific problem with 2D-plot...

Maple

I need to plot a function:

f(1.0) gives a correct result but plot doesn't. Could you help me with it?

## The problem with applyrule and substitut...

Maple

I am trying to make a substitution:

> restart;
> f1 := conjugate(z)^2*z^2;
> f2 := applyrule(z*conjugate(z) = x, f1);

however the result is

f2 := conjugate(z)^2*z^2

Do you have any ideas how to solve the problem? Thank you.

## One element of a set have disappeared af...

Maple

Please look at the following set.

 >
 (1)
 >

Why?

## A problem with Threads using...

Hi. I need to calculate the elements of the large two-dimensional symmetric matrix.

for j from 1 to N do
for i from j to N do
a[i,j]:=elem(i,j):
od:
od:

The calculations of elements are time consuming. I want to use Threads for this purpose. Could you help me with it? Thank you.

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