consolidate: Various low-level helper functions
In wedge: The Exterior Calculus

Description Usage Arguments Details Author(s) See Also Examples

Various low-level helper functions used in Alt() and kform()

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consolidate(S)
kill_trivial_rows(S)
include_perms(S)

`S`	Object of class `spray`

Low-level helper functions.

Function consolidate() takes a spray object, and combines any rows that are identical up to a permutation, respecting the sign of the permutation
Function kill_trivial_rows() takes a spray object and deletes any rows with a repeated entry (which have k-forms identically zero)
Function include_perms() replaces each row of a spray object with all its permutations, respecting the sign of the permutation

Robin K. S. Hankin

ktensor,kform

S <- spray(matrix(c(1,1,2,2,1,3,3,1,3,5),ncol=2,byrow=TRUE),1:5)
kill_trivial_rows(S)
consolidate(S)

## Not run: include_perms(S) #  This will fail because of the repeated rows
include_perms(kill_trivial_rows(S)) # This should work