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liesymm[setup] - define the coordinates

Calling Sequence

setup(coords)

Parameters

coords

-

expression sequence, list or set of strings to be used as names for coordinates

Description

• 

This routine is part of the liesymm package and is loaded via with(liesymm).

• 

It returns a list of the coordinates to be used in constructing wedge products and defining the actions of functions such as d().

• 

If no argument is given, then all existing coordinates are removed.

• 

As part of its action, the remember tables of functions such as d(), &^, Lie(), hook(), makeforms(), and wcollect() are cleared in preparation for any new definitions. It is advisable that setup be used between problems so as to keep the underlying coordinate list to a minimum size.

Examples

withliesymm:

setup

(1)

dx+y+t

0

(2)

setupx,y,z

x,y,z

(3)

a:=dx+y+t

a:=dx+dy

(4)

setup

(5)

a

0

(6)

See Also

liesymm, liesymm[&^], liesymm[close], liesymm[d], liesymm[Lie], liesymm[makeforms], with


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