Definition:
A 2-subdivision of a graph results from inserting 2 new vertices in
every edge, that is from replacing each edge uv with a
P4
uxyv.
A graph is a 2-subdivision
if it is the
2-subdivision of some graph.
planar (C4,C5,C6,C7,C8,H,X85,triangle)-free
planar | Recognition: | Polynomial | details |
| Cliquewidth expression: | Unbounded or NP-complete | details |
| Cliquewidth: | Unknown to ISGCI | details |
| Weighted independent set: | NP-complete | details |
| Independent set: | NP-complete | details |
| Domination: | Unknown to ISGCI | details |
Algorithms for Recognition
Polynomial
Algorithms for Cliquewidth expression
See also
: Cliquewidth : Weighted independent set : Domination
Algorithms for Cliquewidth
See also
: Cliquewidth expression
Algorithms for Weighted independent set
See also
: Cliquewidth expression : Independent set
Algorithms for Independent set
NP-complete from 2-subdivision
planar
2-subdivision planar
are precisely the 2-subdivision
graphs of planar
graphs.
|
| From Poljak's [1111] construction (which is a 2-subdivision). See also [453] |
Algorithms for Domination
See also
: Cliquewidth expression