## 90 Reputation

11 years, 278 days

## what is the command to find the rank of ...

Maple

what is the command to find the rank of a polynomial?

actually i do not know the definition of rank of polynomial

i guess rank of x*y = 2 rank of x^3*z^2 = 5

i guess rank of  x*y+ x^3*z^2 is the maximum of above ranks, so it is 5

if i am wrong, please tell me, as i can not find in google, and there is no definition in my book

## how to get a polynomial with degree n?...

Maple

i calculate a polynomial as following

yn := f(x) = _C1*hypergeom([-(1/2)*n, 3/2+(1/2)*n], [1/2], x^2)+_C2*hypergeom([2+(1/2)*n, 1/2-(1/2)*n], [3/2], x^2)*x

want to get the polynomial with degree n  for  summation_n_from_0_to_infinity y_n*z^n/n!

such as n = 1 n = 0 n = 3, but above yn is hypergeom, is n represent degree, if so, i use subs, then is finished, if not, how to get polynomial with degree n?

## what is command to find x in terms of u?...

Maple

u = -1/2*ln(-2*t*x+x^2+1)/x;

what is command to find x in terms of u of above formula? i.e. x = u^2+u+1

## How to output a list when writing a proc...

Maple

How to output a list when writing a procedure

i want to get the list c in the procedure, but "return" c not work

z := [x1, x2, x3];
symMonomial(z)

symMonomial := proc(test)
with(combinat):
h := 0;
for i from 1 to nops(test) do
h[i] := choose(z,i);
od;

c := 0;
for k from 1 to nops(test) do
c[k] := 0;
for i from 1 to nops(h[k]) do
ki := 1;

## How to convert toS() basis to polynomial...

Maple

i use symmetric function package

with(SF):

i would like to know after calculating the basis toS(....)

which function can be used to convert into polynomials?

as i expect to get the sequence from any polynomials generated from it

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