atlas[Who] - finding out "who is who" in atlas package 

Calling Sequence: 

    Who()
    Who(L) 

Parameters: 

     L -an identifier, list or set of identifies. 

Description: 

• In the atlas package any identifier is treated as 0-form i.e. as non-constan scalar (if it not declared as constant, p-form, tensor etc. (see atlas[types])).

 

• The Who procedure allows one  to find out "who is who".

 

• Who() - returns information about all declarations made;

 

• Who(L) where L is an identifier - returns information about object L;

 

• Who(L) where L is a list or set of identifiers - returns information about all objects in L;

 

Examples: 

>	restart: with(atlas):

 

Declare domain 

>	Domain(Top);

 

(2.1)

 

Declare constants:  

>	Constants(alpha,beta,C,lambda);

 

(2.2)

 

Declare functions:  

>	Functions(f=f(x,y),y=y(z));

 

(2.3)

 

Declare vectors:  

>	Vectors(E[j],X,Y,Z,U[i]);

 

(2.4)

 

Declare forms:  

>	Forms(e[j]=1,omega=2,theta=p);

 

(2.5)

 

Declare Tensors:  

>	Tensors(T=[n,k]);

 

(2.6)

 

Let's see "who is who" 

>

Who(z);

 

z: 0 - form

 

>	Who([X,omega]);

 

X: vector omega: 2 - form

 

>	Who({E[j],Top,T});

 

T: [n, k] - tensor Top: domain E[j]: vector

 

>

Who();

 

(2.7)

 

>

 

See Also:  

atlas, atlas[Constants], atlas[Functions], atlas[Forms], atlas[Tensors], atlas[Domain].