We define an intersection product of tropical cycles on matroid varieties(via cutting out the diagonal) and show that it is well-behaved. In particular,this enables us to intersect cycles on moduli spaces of tropical rationalmarked curves $M_{0,n}$ and $M_{0,n}(\R^r, d)$. This intersection product canbe extended to smooth varieties (whose local models are matroid varieties). Wealso study pull-backs of cycles and rational equivalence.
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机译：我们定义了类拟似变体上热带周期的交集（通过切掉对角线），并证明其表现良好。特别地，这使我们能够在热带有理标记曲线$ M_ {0，n} $和$ M_ {0，n}（\ R ^ r，d）$的模空间上相交周期。该相交产品可以扩展到平滑品种（其局部模型是拟阵变种）。我们还研究周期和合理等价的回撤。
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