4 ms·
The definition of graceful graph is wrong. Edges E_{i,j} should have unique values as well, i.e. {E_{i,j}} = {1, 2, ..., n}. Otherwise it's trivial to label eve
by noud 7y ago
The definition of graceful graph is wrong. Edges E_{i,j} should have unique values as well, i.e. {E_{i,j}} = {1, 2, ..., n}. Otherwise it's trivial to label every graph into a graceful graph.