For edge ideals I and J with I contained in J, the regularity of IJ is bounded by induced matching and chordal cover invariants, and exact values are found for several graph classes.
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Bounds for the regularity of product of edge ideals
For edge ideals I and J with I contained in J, the regularity of IJ is bounded by induced matching and chordal cover invariants, and exact values are found for several graph classes.