We give an approximate Menger-type theorem for when a graph $G$ contains two $X-Y$ paths $P_1$ and $P_2$ such that $P_1 \cup P_2$ is an induced subgraph of $G$. More generally, we prove that there exists a function $f(d) \in O(d)$, such that for every graph $G$ and $X,Y \subseteq V(G)$, either there exist two $X-Y$ paths $P_1$ and $P_2$ such that the distance between $P_1$ and $P_2$ is at least $d$, or there exists $v \in V(G)$ such that the ball of radius $f(d)$ centered at $v$ intersects every $X-Y$ path.
翻译:我们给出了一个近似Menger型定理,该定理研究图$G$何时包含两条$X-Y$路径$P_1$和$P_2$,使得$P_1 \cup P_2$是$G$的诱导子图。更一般地,我们证明存在一个函数$f(d) \in O(d)$,使得对于任意图$G$及$X,Y \subseteq V(G)$,要么存在两条$X-Y$路径$P_1$和$P_2$,它们之间的距离至少为$d$,要么存在$v \in V(G)$,使得以$v$为中心、半径为$f(d)$的球与每条$X-Y$路径相交。