Nothing
set_power <-
function(x)
{
if (length(x) < 1L) return(set(set()))
set_union(set(set()),
as.set(unlist(lapply(seq_along(x),
function(i)
apply(combn(.as.list(x), i), 2L, as.set)
),
recursive = FALSE)
)
)
}
gset_power <-
function(x)
{
if (length(x) < 1L) return(set(set()))
.make_gset_from_list(c(list(gset()),
unlist(lapply(seq_along(x),
function(i) gset_combn(x, i)
),
recursive = FALSE)
)
)
}
cset_power <-
function(x)
{
if (length(x) < 1L) return(set(set()))
.make_gset_from_list(c(list(gset()),
unlist(lapply(seq_along(x),
function(i) cset_combn(x, i)
),
recursive = FALSE)
)
)
}
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