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Shortcut to enter colon-dash?...

Asked by: C_R 3727
command-completion shortcut colon-dash
15 hours ago
0  0

The command completion facility is real time saver. On the other hand, entering the colon dash is not fluent since it requires searching the keys on the key board.

I was wondering if there is a keyboard shortcut that enters both characters at once.

Replacing placeholder names in nested RootOfs...

Asked by: C_R 3727
integral
April 08 2026
0  4

Is there an easier or shorter way to do the following? Any handy package command?

RootOf(-(Int(1/sqrt(2*cos(_a)+RootOf(-(Int(1/sqrt(2*cos(_a)+_Z), _a = 0 .. Pi))+_a+c__2)), _a = 0 .. _Z))+x+c__2)

RootOf(-(Int(1/(2*cos(_a)+RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2))^(1/2), _a = 0 .. _Z))+x+c__2)

 (1)

indets(RootOf(-(Int(1/(2*cos(_a)+RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2))^(1/2), _a = 0 .. _Z))+x+c__2), 'specfunc(anything, RootOf)')

{RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2), RootOf(-(Int(1/(2*cos(_a)+RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2))^(1/2), _a = 0 .. _Z))+x+c__2)}

 (2)

subs(_a = _b, {RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2), RootOf(-(Int(1/(2*cos(_a)+RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2))^(1/2), _a = 0 .. _Z))+x+c__2)}[1])

RootOf(-(Int(1/(2*cos(_b)+_Z)^(1/2), _b = 0 .. Pi))+_b+c__2)

 (3)

subs({RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2), RootOf(-(Int(1/(2*cos(_a)+RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2))^(1/2), _a = 0 .. _Z))+x+c__2)}[1] = RootOf(-(Int(1/(2*cos(_b)+_Z)^(1/2), _b = 0 .. Pi))+_b+c__2), RootOf(-(Int(1/(2*cos(_a)+RootOf(-(Int(1/(2*cos(_a)+_Z)^(1/2), _a = 0 .. Pi))+_a+c__2))^(1/2), _a = 0 .. _Z))+x+c__2))

RootOf(-(Int(1/(2*cos(_a)+RootOf(-(Int(1/(2*cos(_b)+_Z)^(1/2), _b = 0 .. Pi))+_b+c__2))^(1/2), _a = 0 .. _Z))+x+c__2)

 (4)

NULL

Related question: Is that substitution mathematically correct or does the _a belong to the outermost RootOf?

Download parameters_in_nested_RootOf.mw

multi limit fail, but separate limits works...

Asked by: nm 12253
limit incomplete-question
April 02 2026
0  4

Maple 2026 and Maple 2025.2

Is this a bug in limit? or as designed?

Doing 

limit(sol,[_C3 = 0, _C4 = 0])

Gives internal error. But

limit(sol,_C3 = 0);
limit(%,_C4 = 0);

works and no error.

Worksheet below. I've had problems before with multilimit. I think I need to change my code to do limit one by one from now on.

> 

interface(version);

`Standard Worksheet Interface, Maple 2026.0, Windows 10, March 05 2026 Build ID 2001916`

> 

restart;
> 

sol:=(piecewise(t <= 0,0,t <= Pi,(arctan(tan(t))*cos(t)*_C3*_C4+arctan(tan(t))*sin(t)*_C4^2-cos(t)*_C3*_C4*t+sin(t)*_C3^2*t)/(_C3*cos(t)+_C4*sin(t)),Pi < t,Pi*_C3*(tan(t)*_C3-_C4)/(tan(t)*_C4+_C3))+2*_C3^2+2*_C4^2)*(_C3*cos(t)+_C4*sin(t))/(2*_C3^2+2*_C4^2)

sol := (piecewise(t <= 0, 0, t <= Pi, (arctan(tan(t))*cos(t)*_C3*_C4+arctan(tan(t))*sin(t)*_C4^2-cos(t)*_C3*_C4*t+sin(t)*_C3^2*t)/(cos(t)*_C3+_C4*sin(t)), Pi < t, Pi*_C3*(tan(t)*_C3-_C4)/(tan(t)*_C4+_C3))+2*_C3^2+2*_C4^2)*(cos(t)*_C3+_C4*sin(t))/(2*_C3^2+2*_C4^2)

> 

limit(sol,[_C3 = 0, _C4 = 0])

Error, (in limit/multi/ldegree1) invalid input: limit/multi/ReIm expects its 1st argument, f, to be of type polynom, but received _DIR1*cos(t)+_DIR2*sin(t)

> 

limit(sol,_C3 = 0)

piecewise(t <= 0, _C4*sin(t), t <= Pi, (1/2)*arctan(tan(t))*sin(t)+_C4*sin(t), _C4*sin(t))

> 

limit(%,_C4 = 0)

piecewise(t <= 0, 0, t <= Pi, (1/2)*arctan(tan(t))*sin(t), 0)

 

 

Download limit_problem_april_2_2026.mw

Bug in XMLTools:-ParseFile...

Asked by: Anthrazit 925
xmltools
March 16 2026
0  3

There seems to be a regression in Maple 2026 in the XMLTools:-ParseFile function.

As Maple2026 is not yet in the list of products to be chosen, I have added it in the subject.

Error, (in XMLTools:-ParseFile) invalid input: too many and/or wrong type of arguments passed to XMLTools:-NSXML:-Parser:-ParseFile; first unused argument is prolog = true

The test file is right from the help related to ParseFile.
Test_XML.mw

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