The lower matching number of a graph is the minimum size of a maximal independent edge set.
The (upper) matching number may be similarly defined as the largest size of an independent edge set.
The lower matching number of a graph is the minimum size of a maximal independent edge set.
The (upper) matching number may be similarly defined as the largest size of an independent edge set.
Weisstein, Eric W. "Lower Matching Number." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LowerMatchingNumber.html