MaplePrimes - Maple Posts and Questions

Replacing placeholder names in nested RootOfs

C_R — Wed, 08 Apr 2026 05:32:52 Z

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

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

Sphere with earth texture

erik10 — Wed, 08 Apr 2026 00:42:02 Z

Dear Maple users

Is there a way in Maple to create a sphere with a texture similar to that of the Earth (UV mapping maybe?). I plan to later add mathematically defined spatial curves to the sphere to study differential geometry aspects.

Erik

Substitution in pde with conjugate?

salim-barzani — Tue, 07 Apr 2026 21:28:05 Z

most of time is give me true my substittuetion but a lot time i saw it is not make my substittuetion true and this time i figure out which author did and outcome is what i am looking but when i do that is so different where is problem

f-m.mw

How to find equation involving two odes?

salim-barzani — Tue, 07 Apr 2026 17:22:38 Z

In here i did try my best and my equation outcome are ok but is not same as author did i dont know why, beside this he try to use two ode for constructing a new ode which find of one solution of this can be the third solution of ode!
i have to use eq(5) for my orginal ode but eq(5) contain f(x) and g(x) which by some assumption and taking two other ode eq(6) and eq(7) they construct new one which is eq(14) and by f(xi) and g(xi) have corelation with W(xi) which is third ode as in eq(9) and eq(11) mentioned, i try to use the solution which author mentioned but is not give me solution of third ode by using corelation what is problem here? also in eq(21) and eq(25) when thus parameter are satisfy must our odetest be zero

i will update two maple file which realted separatly for constructing equations and other is for apply and satisfy the solution for ode!

F-p.mw

ode-17.mw

Prompt for AI Assistant

C_R — Tue, 07 Apr 2026 04:36:04 Z

To find the recently introduced new command that compares two expressions, I prompted the large model:

Answer:

A useful Maple command specifically for comparing two expressions is verify.
Use it like this:
verify(expr1, expr2, equal);
This asks Maple whether the two expressions are mathematically equal.
If you want a more robust algebraic check, a very common alternative is:
is(simplify(expr1 - expr2) = 0);
For polynomial expressions, this is also common:
evalb(expand(expr1 - expr2) = 0);

This is not what I was looking for. I was looking for the command that visually highlights differences.
Can the prompt be improved?

convolution boundaries

JoyDivisionMan — Mon, 06 Apr 2026 17:45:57 Z

Greetings, Friends.

I have a function f(t) which is a density function. It has a [0,2] interval and integrates to unity. I convolve f(t) with itself to get g(t). It has a [0,4] interval and integrates to unity. All is well with that and I understand.

BUT, the boundary of g(t) shouild be on the interval [0,4/sqrt(3)]. This is based upon both my simulation and other analyses.

At present, the area of the g(t) function on the [4/sqrt(3), 4] interval accounts for 1.408701% of the area under the curve. Not a "trivial" nor "throwaway" amount.

Does anyone know of a way to "re-scale" or modify my convolved result g(t) so that all of the resultant area under the curve is on the [0,4/sqrt(3)] interval?

My work is attached.

(1)

(2)

(3)

(4)

(5)

(6)

(7)

Download SphereConvolution.mw