List edge and list total colourings of multigraphs
Journal of Combinatorial Theory Series B
Theoretical Computer Science - Game theory meets theoretical computer science
Reconfigurations in Graphs and Grids
SIAM Journal on Discrete Mathematics
Games, Puzzles, and Computation
Games, Puzzles, and Computation
Reconfiguration of List Edge-Colorings in a Graph
WADS '09 Proceedings of the 11th International Symposium on Algorithms and Data Structures
Finding Paths between graph colourings: PSPACE-completeness and superpolynomial distances
Theoretical Computer Science
The Connectivity of Boolean Satisfiability: Computational and Structural Dichotomies
SIAM Journal on Computing
Relationships between nondeterministic and deterministic tape complexities
Journal of Computer and System Sciences
On the complexity of reconfiguration problems
Theoretical Computer Science
Shortest paths between shortest paths and independent sets
IWOCA'10 Proceedings of the 21st international conference on Combinatorial algorithms
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We study the problem of reconfiguring one list edge-coloring of a graph into another list edge-coloring by changing only one edge color assignment at a time, while at all times maintaining a list edge-coloring, given a list of allowed colors for each edge. First we show that this problem is PSPACE-complete, even for planar graphs of maximum degree 3 and just six colors. We then consider the problem restricted to trees. We show that any list edge-coloring can be transformed into any other under the sufficient condition that the number of allowed colors for each edge is strictly larger than the degrees of both its endpoints. This sufficient condition is best possible in some sense. Our proof yields a polynomial-time algorithm that finds a transformation between two given list edge-colorings of a tree with n vertices using O(n^2) recolor steps. This worst-case bound is tight: we give an infinite family of instances on paths that satisfy our sufficient condition and whose reconfiguration requires @W(n^2) recolor steps.