C_R

2325 Reputation

19 Badges

4 years, 297 days

MaplePrimes Activity


These are questions asked by C_R

I found this option in an API command ?MapleSim,LinkModel,Simulate:

    scalemethod : one of the following: "none", "minimum", "maximum", "geometric"
    Method of variable scaling applied to the system.

I did not find anything about scaling in Maples help system.

What exactly does the scaling do?

I found the option in this statement

dsn := dsolve(dsys, numeric, differential = true, projection = false, maxfun = 0)

in help("examples/numeric_DAE")

 

I give up searching because

  • the word "differential" occurs so often in dsolve help pages that advanced search does of not filter help topics effectively
  • the option does not seem to be a dsolve[numeric] or rk45 specific option (at least I cannot find anything on the pages)

What does the option do?
How could I have searched better?

I found this option mentioned in help(MapleSim,Multibody,Dynamic_Exports).

For the example of the help page I tried

SliderCrank:-GetDynEQs(AugType = Reaction);
SliderCrank:-GetDynEQs(AugType = Lagrange);

but the output is the same (which I would expect since GetDynEQs is not defined with parameters).

In the help system I only find deprecated commands that use this option

How can this option be set in newer versions of MapleSim without using deprecated commands?

The below is not properly rendering in my browser. You probably have to open the worksheet
 

De Morgan's law from https://en.wikipedia.org/wiki/De_Morgan%27s_laws

NULL

iff(not (P or Q), `and`(not P, not Q))

not (P or Q) implies not (P or Q)

(1)

iff(not (P and Q), `or`(not P, not Q))

not (P and Q) implies not (P and Q)

(2)

NULL

 

Edit: Asking differently: Which symbol from the palettes can be used for equivalence (in a logic context)?

Edit2: Title changed. Original title: Why does Maple replace the equivalence symbol by an implication symbol

Download De_Morgans_law.mw

In help(EllipticF): Why is the parameter k not called “the modulus of the elliptic function” as in the definition of the inverse Jacobi functions in help(InverseJacobiPQ)?

Instead, it is called “the parameter” which can be confused with the parameter m=k^2 used in other notations (which is refered to "a parameter m" in the EllipticF help page).

Is there a reason for this, or should the parameter definitions of the first, second and thrid elliptic integrals not be aligned with the parameter definitions of the Jacobi functions and their inverses?

DLMF for example defines k as modulus for both, the Elliptic Integrals and the Jacobian Elliptic Functions.

A user who wants to transfer an expression from a different notation to Maple might misinterpret parameters.

First 9 10 11 12 13 14 15 Last Page 11 of 29