Abstract
When formula presented is a collection of matroids, the question whether M has a minor in formula presented can be easy or hard, depending on the choice of More precisely, the number of demands made on an “independence oracle” to decide the question sometimes can be bounded above by a polynomial in E(M), and sometimes it cannot. We study this, and in particular classify each singleton formula presented as easy or hard.
Original language | English (US) |
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Pages (from-to) | 193-203 |
Number of pages | 11 |
Journal | Journal of the London Mathematical Society |
Volume | s2-23 |
Issue number | 2 |
DOIs | |
State | Published - Apr 1981 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- General Mathematics