I am reading about essential surfaces and I know that $F\times \{pt\}$ is essential within the mapping torus of $F$. I also know there are essential tori in $F\times S^1$. Are there other broad classes of essential surfaces?
Thanks!
I am reading about essential surfaces and I know that $F\times \{pt\}$ is essential within the mapping torus of $F$. I also know there are essential tori in $F\times S^1$. Are there other broad classes of essential surfaces?
Thanks!
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