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On Matroid Represent ability and Minor Problems

机译:在麦芽糖代表能力和轻微问题

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摘要

In this paper we look at complexity aspects of the following problem (matroid representability) which seems to play an important role in structural matroid theory: Given a rational matrix representing the matroid M, the question is whether M can be represented also over another specific finite field. We prove this problem is hard, and so is the related problem of minor testing in rational matroids. The results hold even if we restrict to matroids of branch-width three.
机译:在本文中,我们看出以下问题的复杂性方面(Matroid可夺冠),似乎在结构性麦芽瘤理论中发挥着重要作用:给出了代表Matroid M的理性矩阵,问题是M可以也可以代表另一个特定的有限情况场地。我们证明了这个问题是艰难的,因此有理追加者的微小测试的相关问题。结果仍然存在,即使我们限制了分支宽度三的麦芽蛋白。

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