backwards {freegroup} | R Documentation |
Write free objects backwards
Description
Write free objects in reverse order
Usage
backwards(x)
Arguments
x |
Object of class |
Note
For each element of a free
object, function backwards()
writes the symbols in reverse order. It is distinct from
rev()
, see examples.
Function backwards is an involution: it is its own inverse.
Author(s)
Robin K. S. Hankin
Examples
abc(1:5)
backwards(abc(1:5))
rev(abc(1:5))
x <- rfree(10,5)
backwards(backwards(x)) == x # involution
all(abelianize(x) == abelianize(backwards(x))) # should be TRUE
[Package freegroup version 1.2-0 Index]