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figgisfiddis

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@tomleslie  @Preben Alsholm  ...

figgisfiddis 5
March 30 2018
0 0

@tomleslie 
@Preben Alsholm 

Reinstalling seems to have solved the problem, thanks.

The error happens towards the end...

figgisfiddis 5
March 29 2018
0 0

@tomleslie

> 

restart
> 

with(plots):
> 

q := 1;

1

 (1)
> 

rho := sqrt(VectorCalculus:-`*`(b^2, 1/VectorCalculus:-`+`(1, VectorCalculus:-`-`(VectorCalculus:-`*`(epsilon^2, cos(phi)^2)))));

(b^2/(1-epsilon^2*cos(phi)^2))^(1/2)

  

h*sin(n*phi)

 (2)
> 

b := 1;

1

  

1/5

  

1/5

  

1

 (3)

 

> 

rho;

(1/(1-(1/25)*cos(phi)^2))^(1/2)

  

(1/5)*sin(phi)

 (4)
> 

x := VectorCalculus:-`*`(rho, cos(phi));

(1/(1-(1/25)*cos(phi)^2))^(1/2)*cos(phi)

  

(1/(1-(1/25)*cos(phi)^2))^(1/2)*sin(phi)

  

(1/5)*sin(phi)

 (5)
> 

E := `<,>`(VectorCalculus:-`*`(VectorCalculus:-`*`(q, x), 1/VectorCalculus:-`+`(VectorCalculus:-`+`(x^2, y^2), z^2)^VectorCalculus:-`*`(3, 1/2)), VectorCalculus:-`*`(VectorCalculus:-`*`(q, y), 1/VectorCalculus:-`+`(VectorCalculus:-`+`(x^2, y^2), z^2)^VectorCalculus:-`*`(3, 1/2)), VectorCalculus:-`*`(VectorCalculus:-`*`(q, z), 1/VectorCalculus:-`+`(VectorCalculus:-`+`(x^2, y^2), z^2)^VectorCalculus:-`*`(3, 1/2)));

E := sqrt(1/(1-(1/25)*cos(phi)^2))*cos(phi)*e[x]/(cos(phi)^2/(1-(1/25)*cos(phi)^2)+sin(phi)^2/(1-(1/25)*cos(phi)^2)+(1/25)*sin(phi)^2)^(3/2)+sqrt(1/(1-(1/25)*cos(phi)^2))*sin(phi)*e[y]/(cos(phi)^2/(1-(1/25)*cos(phi)^2)+sin(phi)^2/(1-(1/25)*cos(phi)^2)+(1/25)*sin(phi)^2)^(3/2)+(1/5)*sin(phi)*e[z]/(cos(phi)^2/(1-(1/25)*cos(phi)^2)+sin(phi)^2/(1-(1/25)*cos(phi)^2)+(1/25)*sin(phi)^2)^(3/2)

 (6)
> 

> 

l := `<,>`(x, y, z)

l := sqrt(1/(1-(1/25)*cos(phi)^2))*cos(phi)*e[x]+sqrt(1/(1-(1/25)*cos(phi)^2))*sin(phi)*e[y]+(1/5)*sin(phi)*e[z]

 (7)
> 

a := diff(l, phi); E; E.l; E.a

a := (-(1/25)*cos(phi)^2*sin(phi)/(sqrt(1/(1-(1/25)*cos(phi)^2))*(1-(1/25)*cos(phi)^2)^2)-sqrt(1/(1-(1/25)*cos(phi)^2))*sin(phi))*e[x]+(-(1/25)*sin(phi)^2*cos(phi)/(sqrt(1/(1-(1/25)*cos(phi)^2))*(1-(1/25)*cos(phi)^2)^2)+sqrt(1/(1-(1/25)*cos(phi)^2))*cos(phi))*e[y]+(1/5)*cos(phi)*e[z]

  

sqrt(1/(1-(1/25)*cos(phi)^2))*cos(phi)*e[x]/(cos(phi)^2/(1-(1/25)*cos(phi)^2)+sin(phi)^2/(1-(1/25)*cos(phi)^2)+(1/25)*sin(phi)^2)^(3/2)+sqrt(1/(1-(1/25)*cos(phi)^2))*sin(phi)*e[y]/(cos(phi)^2/(1-(1/25)*cos(phi)^2)+sin(phi)^2/(1-(1/25)*cos(phi)^2)+(1/25)*sin(phi)^2)^(3/2)+(1/5)*sin(phi)*e[z]/(cos(phi)^2/(1-(1/25)*cos(phi)^2)+sin(phi)^2/(1-(1/25)*cos(phi)^2)+(1/25)*sin(phi)^2)^(3/2)

  

Error, (in property/ConvertProperty) invalid input: PropRange uses a 2nd argument, b, which is missing

  

Error, (in property/ConvertProperty) invalid input: PropRange uses a 2nd argument, b, which is missing

  
> 

int(simplify(E.(diff(l, phi))), phi = -Pi .. Pi)

Error, (in property/ConvertProperty) invalid input: PropRange uses a 2nd argument, b, which is missing

  
> 

``

``

``


 

Download error.mw

After a bit of waiting (I literally didn't even touch Maple between posting the original comment and this edit) E.l started working, but E.a didn't.

Seems like it's not just DotProduct...

figgisfiddis 5
March 29 2018
0 0

I tried using simplify on one of the vectors I'm trying to product, and simplify(r) gave me the same message, implying that a second variable is expected in a function with only one variable? After some fidgeting, it randomly decided that it wants to work. 

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