## 564 Reputation

6 years, 345 days

## Error, (in fsolve) expecting an equation...

Maple

Hi. could anyone help on this code? fsovle doesn't solve it;
12.mw

## how to remove the lists(sets) with all t...

Maple

Hi all. how can i detect and remove the lists with same members? for example in the code below, i want to remove duplicate of the lists with the same members, for example [1,1,5],[1,5,1],[5,1,1]. i want just one of these sets to remain and the others to be removed. it doesn't matter which. i want just one set with members 1,5,1 which their summation is 7. and the same thing for other lists. thanks in advance.

 > restart:with(combinat):with(Iterator):
 > MM:=composition(7, 3)
 (1)
 >

## problem with numeric dsolve...

Maple

hi , i have problem solving numerically, what should i do?

 > restart
 > m:=0.1;a:=10;lamba:=3;
 (1)
 > ode:=diff(y(t),t\$2)+m*cos(a*t)*diff(y(t),t)+lambda/2*y(t)
 (2)
 > IC:=y(0)=1,(D(y))(0) = 0;
 (3)
 > dsolve({ode,IC}): #no problem
 > sol:=dsolve([ode,IC],numeric)
 (4)
 > plots:-odeplot(sol,[t,y(t)],0..1)
 >
 >
 >

## intersection of inequal plot 3d ...

Maple

Hi everybody, i want to plot the intersection volume of three inequality, how can i do it?

 > restart
 > d1:=3:d2:=3:d3:=5:
 > plots:-implicitplot3d([x^2+y^2+z^2
 >