`is.chordal()`

was renamed to `is_chordal()`

to create a more
consistent API.

## Arguments

- graph
The input graph. It may be directed, but edge directions are ignored, as the algorithm is defined for undirected graphs.

- alpha
Numeric vector, the maximal chardinality ordering of the vertices. If it is

`NULL`

, then it is automatically calculated by calling`max_cardinality()`

, or from`alpham1`

if that is given..- alpham1
Numeric vector, the inverse of

`alpha`

. If it is`NULL`

, then it is automatically calculated by calling`max_cardinality()`

, or from`alpha`

.- fillin
Logical scalar, whether to calculate the fill-in edges.

- newgraph
Logical scalar, whether to calculate the triangulated graph.