suppose i have afunction F(x) and i want to draw a sample for X from F(x)

Even and odd complement each other

how to find other sequence which complement each other?

such as 3 sequences divided integers or 5 sequences divided whole integers

is there monomials creation method such that solve result about coefficient and power are integers when right side columns are sequences?

i find even multiplication numbers are always solved into integers coefficient and power.

is there any more other sequences?

if I choose six multiplication table sequence, 

what is this complement of six multiplication table sequence?

AJUSTEMENTIMAGE.mwAJUSTEMENTIMAGE.mwHi,

How do to insert image in Plot0 ?

I am developing an algorythm which returns some differential equation, which I want to simplify. Here is an example:

eqq:= k[t]*(`ℓ`^2)*(diff(q[3](tau), tau, tau)+(5*alpha-sigma+2*theta+1)*q[3](tau)+(-4*alpha+sigma-theta)*q[2](tau)+q[1](tau)*alpha) = -(sqrt(m*(1/k[t]))*`ℓ`*k[t]*`Δθ`*(q[3](tau)-q[2](tau))*sin(sqrt(Lambda*k[t]*(1/m))*sqrt(m*(1/k[t]))*tau)+2*xi*sqrt(lambda*k[t]*m)*(diff(q[3](tau), tau)))*`ℓ`*(1/sqrt(m*(1/k[t])))

I want the parameters to be associated to the the variables, , ,  and their derivattives. So, I have used "collect" command, as below:

vars:= {q[1](tau),q[2](tau),q[3](tau),diff(q[1](tau),tau),diff(q[2](tau),tau),diff(q[3](tau),tau),diff(q[1](tau),tau$2),diff(q[2](tau),tau$2),diff(q[3](tau),tau$2)}:
collect(eqq,vars);

The problem is that the equations remain with non-simplified terms, such as the terms inside the "sine" functions and the term "k[t]*ell^2". The command "simplify" does not have any effect. Ideally, I would like to have something like this:

(diff(q[3](tau), tau, tau))+alpha*q[1](tau)+(-4*alpha+sigma-theta)*q[2](tau)+(5*alpha-sigma+2*theta+1)*q[3](tau)+2*xi*sqrt(lambda)/`ℓ`*(diff(q[3](tau), tau))-`Δθ`*sin(sqrt(Lambda)*tau)*q[2](tau)+`Δθ`*q[3](tau)*sin(sqrt(Lambda)*tau) = 0;

Does anyone know how to solve that?
 

Hi,

I am having trouble with the syntax for entering a limit of a multivariate function with direction specifiers.

For a single variate function f(x) the limit for x -> a from the right is specified by

limit(f(x),x=a,right)

A limit of a multivariate function f(x,y) for x -> a and y -> b can be entered by

limit(f(x,y),{x=a,y=b})

However I do not know how to specify directions in this case. Say, I want x to approach a from the right, and y to approach b from the left. What is the syntax to do this?

Cheers!

Hello

we have a matrix A (s.p.d) and b where LDL^t=A is the cholesky decompositon.

Why is the commands output

LUDecomposition(A, method = 'Cholesky', output = ['L', 'U']);

different from the output described in books or wikipedia.

To be exact:

L, the lower triangular matrix, is not normalized (the diagonal entries should be 1, they are not!)
L^t (upper triangular matrix) too.
D is not available for Cholesky at all.

If we calculate it with GaussianElimination

LUDecomposition(A, output = ['L', 'U'])

L is the wanted normalized lower triangular matrix, but its not normalized with cholesky.

And the DIAGONAL enntries are the wanted diagonal matrix D with cholesky.

This output is very confusing. Please can someone explain how to use/get the correct decomposition?

A example worksheet is attached.

Thank you :)!

Download dasfindetnichtmalpeterlustig.mw

dasfindetnichtmalpeterlustig.mw

How do i change keyboard shortcuts, E.g one of my keyboard keys are broken or have stopped working. How do i redirect my shortcut to another keyboard combination or another hotkey simply.

Hello, is it possible to have a document synchronized in the same way as Onenote? We're a group of engieneer students wanting to share documents, however the only way we can figure out a way to do it. Is uploading to maplecloud groups, sharing a "base" document, and everytime someone "updates" the document you save a new one. So it kind of defeats the purpose of making it a smart idea of collaborating on one document, am i missing something or is this really how oldschool it works?

Hello,

     I'm trying to simplify an expression involving signum and sqrt using assumptions:

assumptions := { A>0,psi::real,1+A*cos(psi)<sqrt(1+sin(psi)),1+sin(psi)>0 }:
signum(1+A*cos(psi)-sqrt(1+sin(psi))):
simplify(%) assuming op(assumptions);

It seems to me that, given these assumptions, we can safely conclude that the result should be -1. However, I can't get Maple to show this. Interestingly, setting A=1 does allow maple to simplify the result to -1. Is there something I'm missing?

Thanks!

I recently corresponded with maplesoft on whether the program Groebner:-Basis always produces reduced Groebner bases or not. They say it does. This mw appears to show it producing a non reduced Groebner Basis for a set of polynomials.

More specifically, the coefficient of the lead term of the first polynomial generated is not 1.

I'd like to be shown wrong here, but I am struggling to see what i could be doing wrong.

Like this one

Download merege_two_diagram.mw

I was wondering how Maple cope with piecewise functions during forward integration and if it's preferable to use dsolve events option in place of defining a piecewise discontinuos function.

As far as I understood dsolve/events halts the integration each time an event is triggered and subsequently restarts the integration using the pre-trigger outputs as new initial conditions. I suppose that by using a piecewise, if a discontinuity is detected, dsolve proceeds exactly in the same way halting and restarting the integration.

Here a toy example of a 2D rolling dice (idea of a rolling dice from the rolling cube by @one man :P ) in which the reaction forces of the floor can be seen as function of the compenetration dice/ground

Both the appraches (events and piecewise) give the same results

falling_dice.mw

First, I want to say thank you to all who contributed to previous questions. God bless you.

I need Maple code in solving first order differential equation using Langrange and Newton's Interpolation Method.

The aim is to compare these two numerical result with the exact in tabular form and also to plot the graph.

Some questions are attached.

ODE_Questions.pdf

I have to take limit of the HeunG function at infinity.

Here is what I tried

This is clearly not working. I have to take limit of a function which consist multiple HeunG functions at infinities.

Hi,

how do I make second power of integers in a list?

e. g.: L1:=[-3,-2,-1,0,1,2,3]

and i want

L2:=[9,4,1,0,1,4,9]

Thanks