protocol

unweighted_graph_protocol

Protocol for unweighted graph predicates, extending the common graph protocol with unweighted edge operations.

Availability:

logtalk_load(graphs(loader))

Author: Paulo Moura

Version: 1:0:0

Date: 2026-02-19

Compilation flags:

static

Extends:

public graph_protocol

Remarks:

(none)

Inherited public predicates:

 add_edges/3  add_vertex/3  add_vertices/3  all_pairs_min_paths/2  all_pairs_min_predecessors/2  breadth_first_order/3  delete_edges/3  delete_vertex/3  delete_vertices/3  depth_first_order/3  edges/2  empty/1  has_path/3  is_bipartite/1  is_complete/1  is_sparse/1  max_path/5  min_distances/3  min_path/5  min_predecessors/3  neighbors/3  new/1  new/2  new/3  number_of_edges/2  number_of_vertices/2  path/3  reachable/3  vertices/2

Public predicates

edge/3

True iff there is an edge between Vertex1 and Vertex2 in Graph.

Compilation flags:

static

Template:

edge(Vertex1,Vertex2,Graph)

Mode and number of proofs:

edge(+vertex,+vertex,+graph) - zero_or_one

---

add_edge/4

Adds an edge between Vertex1 and Vertex2 to the graph.

Compilation flags:

static

Template:

add_edge(Graph,Vertex1,Vertex2,NewGraph)

Mode and number of proofs:

add_edge(+graph,+vertex,+vertex,-graph) - one

---

delete_edge/4

Deletes the edge between Vertex1 and Vertex2 from the graph. The graph is unchanged if the edge does not exist.

Compilation flags:

static

Template:

delete_edge(Graph,Vertex1,Vertex2,NewGraph)

Mode and number of proofs:

delete_edge(+graph,+vertex,+vertex,-graph) - one

---

complement/2

Unifies NewGraph with the complement graph where there is an edge between all pairs of vertices not connected in the original graph.

Compilation flags:

static

Template:

complement(Graph,NewGraph)

Mode and number of proofs:

complement(+graph,-graph) - one

---

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)