## 520 Reputation

9 years, 171 days

## Social Networks and Content at Maplesoft.com

Seldom to ask question after retired math hobby Just waiting for beauty who born in 1994 And waited for her email to mavio@protonmail.com What is the difference in ownership among different universe?

## how to generate this sequence?...

Maple 12

I follow below question to generate binary sequence
but number of sequence is 6 not 5, why 011001 is wrong?

number of sequence should be catalan number.

how to generate this kind of sequence correctly?

For ecah positive integer n, how many 2n-digit binary sequence
b1,b2,b2n with n "0" and n "1" are there such that
for each i=1,2,...2n, the number of "0" is larger than or equal
to the number of "1" in the subsequence b1,b2,...bi?

with(combinat):
with(ListTools):
with(SumTools):
source := permute(Flatten([seq([0,0,0,1,1,1], k=1..1)]), 6);
aavxa := []:
for z in source do
if Summation(z[k], k = 1 .. nops(z)) = 3 then
if z[nops(z)] = 1 and z[1] = 0 then
if Reverse(z) in aavxa then
else
aavxa := [op(aavxa), z];
end if:
end if:
end if:
od:
nops(aavxa);
aavxa;

## How to dsolve when highest derivative at...

Maple 12

y(t)/diff(y(t),t)

how to dsolve when highest derivative at denominator?

## How to assign value to a variable which ...

Maple 12

For a from 1 to 2 do

convert(cat("k",a),symbol) := a;

od;

Error : can not do assignment

how to do ?

## How to make eigenvectors result the same...

Maple 12

Eigenvector result is changing every time it run.

How to make eigenvectors result the same every time it run?

## How to solve two variables summation equ...

Maple

solve( sum((1/(1+x+x^2))*y^n, n=1..infinity) = 1, parametric=true, real);

How to solve two variables summation equation with parametric true or real triangularize?

how to solve for x and y?

 2 3 4 5 6 7 8 Last Page 4 of 141
﻿