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Question: Error, (in collect/recursive) invalid subscript selector with PDEtools:-Solve but OK with solve

Question:Error, (in collect/recursive) invalid subscript selector with PDEtools:-Solve but OK with solve

nm 7930 Maple 2023
solve pdetools
May 30 2023
3

Why this error with PDEtools:-Solve  but not with solve on same exact input?

235572

> 

interface(version);

`Standard Worksheet Interface, Maple 2023.0, Windows 10, March 6 2023 Build ID 1689885`

> 

restart;

235572

> 

expr:=1/9*b^2*(cos(x)^4*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)^2*m^2-6*sin(x)^2*cos(x)^2*hypergeom([1/2, 1/2*m+1],[3/2],-cot(x)^2)*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)*m+4*cos(x)^4*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)^2*m+9*sin(x)^4*hypergeom([1/2, 1/2*m+1],[3/2],-cot(x)^2)^2-12*sin(x)^2*cos(x)^2*hypergeom([1/2, 1/2*m+1],[3/2],-cot(x)^2)*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)+4*cos(x)^4*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)^2-9*sin(x)^(8+2*m))*csc(x)^8:
> 

PDEtools:-Solve(expr =0,x):

Error, (in collect/recursive) invalid subscript selector

> 

PDEtools:-Solve(expr =0,x):

Error, (in collect/recursive) invalid subscript selector

> 

solve(expr =0,x):

Warning, solutions may have been lost

> 

solve(expr =0,x,AllSolutions):

Warning, solutions may have been lost

> 

 

Download problem_Solve_may_30_2023.mw

This looks like regression? as it works ok on Maple 2022

> 

interface(version);

`Standard Worksheet Interface, Maple 2022.2, Windows 10, October 23 2022 Build ID 1657361`

> 

restart;
> 

expr:=1/9*b^2*(cos(x)^4*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)^2*m^2-6*sin(x)^2*cos(x)^2*hypergeom([1/2, 1/2*m+1],[3/2],-cot(x)^2)*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)*m+4*cos(x)^4*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)^2*m+9*sin(x)^4*hypergeom([1/2, 1/2*m+1],[3/2],-cot(x)^2)^2-12*sin(x)^2*cos(x)^2*hypergeom([1/2, 1/2*m+1],[3/2],-cot(x)^2)*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)+4*cos(x)^4*hypergeom([3/2, 1/2*m+2],[5/2],-cot(x)^2)^2-9*sin(x)^(8+2*m))*csc(x)^8:
> 

PDEtools:-Solve(expr =0,x):
> 

solve(expr =0,x):

Warning, solutions may have been lost

> 

 

Download problem_Solve_may_30_2023_maple_2022.mw
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