Open an ACSet by specifying interface legs

Create a structured cospan from an ACSet and leg specifications. Each leg is an integer vector of part indices in the interface object.

Usage

open_acset(apex, interface_ob, ...)

Arguments

apex

ACSet

interface_ob

Character: which object type forms the interface

...

Integer vectors: each argument is a leg (indices into interface_ob)

Value

StructuredCospan

Examples

# Open a path graph at its two endpoints
g <- path_graph(3)           # 1 -> 2 -> 3
sc <- open_acset(g, "V", 1L, 3L)
nlegs(sc)      # 2
#> [1] 2
foot_sizes(sc) # c(1, 1)
#> [1] 1 1