A reconstruction problem related to balance equations-II: the general case
Abstract
Description
A modified $k$-deck of a graph $G$ is obtained by removing $k$ edges of $G$ in all possible ways, and adding $k$ (not necessarily new) edges in all possible ways. Krasikov and Roditty asked if it was possible to construct the usual $k$-edge deck of a graph from its modified $k$-deck. Earlier I solved this problem for the case when $k=1$. In this paper, the problem is completely solved for arbitrary $k$. The proof makes use of the $k$-edge version of Lovász's result and the eigenvalues of certain matrix related to the Johnson graph.
This version differs from the published version. Lemma 2.3 in the published version had a typo in one equation. Also, a long manipulation of some combinatorial expressions was skipped in the original proof of Lemma 2.3, which made it difficult to follow the proof. Here a clearer proof is given.
Improved version of Discrete Mathematics 194, no. 1-3(1999) 281-284
Improved version of Discrete Mathematics 194, no. 1-3(1999) 281-284