Maple 2020 Questions and Posts

How can the surface common to two cylinders be dis...

Asked by: Earl 980

July 30 2023

1 5

1) the two cylinders are centered on the x and z axis respectively

2) any two intersecting cylinders

How do I make these commands???...

Asked by: delvin 55

July 30 2023

0 5

Hi,

I want to define the functions 10 and 11 and then put them in the eq equation, then simplify them and get the unknown values after the solve command, but there are error.

And value the function psi ?

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"U(xi[n]):=a[0]+sum(-a[i]*psi^(i)(xi[n]),i=1..1)+sum(-b[i]*psi^(-i)(xi[n]),i=1..1)+sum(-c[i]*((diff(psi,xi[n])^(i)))/(psi^(i)(xi[n])),i=1..1);"

Error, empty script base

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(1)

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(2)

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eq := c*(diff(U, xi[n]))*(U(xi[n])+u(xi[n-1]))*(U(xi[n])+u(xi[n+1]))-(2*(u(xi[n-1])-u(xi[n+1])))*(U(xi[n])^2)(1-U(xi[n])^2)

(3)

Download abs.mw

how do I want to produce a graph that has differen...

Asked by: Afiqah Asmadi 5

July 06 2023

1 2

the graf that I want to generate is like this one

Windows 11 and Maple 2020...

Asked by: dagbo 5

May 24 2023

1 2

Hei

Vet noen om Windows 11 støtter Maple 2020? Eller støttes det bare av Windows 10.

I learned about Dodgson calculation of the determinant only recently (https://en.m.wikipedia.org/wiki/Dodgson_condensation).
I am only interested in symbolic expressions of the determinant.
Furthermore, I compared several methods. Not surprisingly, the build in method is the fastest. But why is the seq method slower than the proc method for the Dodgson method? Is there anything I could do to program it more efficiently?

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DetDef := proc (A) local i, n, sigma; description "Jeremy Johnson. Downloaded from https://www.cs.drexel.edu/~jjohnson/2016-17/winter/cs300/lectures/determinant.mw"; n := RowDimension(A); add(PermParity(Perm(sigma))*mul(A[i, sigma[i]], i = 1 .. n), `in`(sigma, permute([`$`(1 .. n)]))) end proc

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InnerMatrix := proc (M::Matrix) SubMatrix(M, 2 .. RowDimension(M)-1, 2 .. ColumnDimension(M)-1) end proc

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MatrixDet := proc (M::Matrix) local C, n, i, j; n := RowDimension(M)-1; C := Matrix(n, n); seq(seq(assign('C[i, j]', Determinant(M([i, i+1], [j, j+1]))), j = 1 .. n), i = 1 .. n); return C end proc

>	Dodgson := proc(M::Matrix) MatrixDet(M); InnerMatrix(M) ^~ (-1) ~ MatrixDet(MatrixDet(M)); do if 1 < RowDimension(%) then InnerMatrix(`%%`) ^~ (-1) ~ MatrixDet(%); end if; until RowDimension(%) = 1; Trace(%): end proc:

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Dodgsonseq := proc (E::Matrix) local w, dim, Z; dim := RowDimension(E); Z[dim] := E; Z[dim-1] := MatrixDet(E); Z[dim-2] := `~`[`*`](`~`[`^`](InnerMatrix(E), -1), MatrixDet(MatrixDet(E))); seq(assign('Z[w-1]', `~`[`*`](`~`[`^`](InnerMatrix(Z[w+1]), -1), MatrixDet(Z[w]))), w = dim-1 .. 1, -1); Trace(Z[1]) end proc

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LaPlace := proc (M::Matrix) local c; add((-1)^(c+1)*M[1, c]*Minor(M, 1, c), c = 1 .. ColumnDimension(M)) end proc

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(1)

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(2)

Download test_Determinants_symbolic.mw

Help using URL:-Get...

Asked by: Christopher2222 5860

May 05 2023

0 7

Just need some help using URL:-Get

Get("https://sdo.gsfc.nasa.gov/assets/img/browse/2023/05/05/20230505 _184918_512_0304.jpg")

I'm sure there are some tags to use but not sure how. The site does show a script on best practices, but at the moment don't know how to apply them. Can anyone offer some help?

How can Maple display all of the possible triangul...

Asked by: Earl 980

April 29 2023

4 6

As an example, the second display in the web site below shows the 42 possible triangulations of a cyclic heptagon polygon.

https://en.wikipedia.org/wiki/Polygon_triangulation

maple bug with sum...

Asked by: plouffe 15

April 27 2023

2 10

Hello,

I am trying to evaluate this expression numerically or symbolically without success.

> sum(1/(4.0*n^2-4*n+4*100000000^2+1)/10^n,n=1..infinity);

Maple is having hard time to convert it to LerchPhi and even more to evalf(%);

PS : mathematica is doing it at any precision very fast or can translate this into hypegoemetric.

PS2 : I use maple 2020 on windows 10 64 bits.

Can a colored shape in the xy plane be projected o...

Asked by: Earl 980

April 20 2023

2 3

Is there any simple way that the colored shape created in the xy plane by the uploaded code can be projected in the z direction onto the surface of the unit sphere centred at the origin?

Projection.mw

guide on solving and graphing?...

Asked by: delvin 55

March 13 2023

0 4

hi,

What command can I use to solve the attached equation and draw its graph?

Download Ode_equation.mw

What does abs(F) mean in package Physics ?...

Asked by: sand15 802

March 07 2023

2 8

I am a newbie in the use of the Physics package.
As I'm interested in modeling dynamic articulated systems, I began reading the example about Mechanics (Statics).

My question is quite simple: let F some vector force of components a * _i and b * _j , what does abs(F) represent?

I naively thought that abs(F) was the modulus of F and expected it to be non negative. But I get some negative values (as in the tutorial example for some values of angle alpha.

Thanks in advance

How I can remove Root of in solving process...

Asked by: NIMA112 35

February 27 2023

1 1

How I can ontain results without Rootof !!

Thanks

help.mw

Download help.mw

What is the meaning of this error in pdsolve comma...

Asked by: sharmamanjeet391 5

February 26 2023

1 2

problemfilepdsolve.mw

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(1)

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diff(q(x, t), x)+3*q(x, t)^(2/3)/p(x, t)^2

(2)

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Error, (in pdsolve/sys) found the element '_F2' repeated in the indication of blocks variables

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(3)

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eq4 := diff(q(x), x)-(-3*q(x))*(1/(p(x)^2*q(x)^(1/3)))

diff(q(x), x)+3*q(x)^(2/3)/p(x)^2

(4)

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$[{q(x) = -27/(_C1*x+_C2)^3}, {p(x) = (-3*(diff(q(x), x))*q(x)^(2/3))^(1/2)/(diff(q(x), x)), p(x) = -(-3*(diff(q(x), x))*q(x)^(2/3))^(1/2)/(diff(q(x), x))}]$

(5)

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(6)

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(7)

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(8)

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(10)

Help me in finding the solution of system eq1 and eq2.

Download problemfilepdsolve.mw

More than 10 rows and columns of the matrix, on wo...

Asked by: kiiranen 5

February 23 2023

1 2

Maple 2020 beginner user - matrices shows 10 rows and columns on worksheet, by default. How to increase this value up to 16 and more? Of course, there is possibility (browse matrix) to see all values and export to Excel also, but better to see all 16 on worksheet.

How can I search multiple worksheets for a specifi...

Asked by: Earl 980

February 12 2023

1 13

I would like to know which of the more than 100 worksheets I have in a Windows 11 folder execute the events operation within dsolve numeric.

Is there a way to identify which of this large number of Maple worksheets contain a given phrase e.g. "events"?

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