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Sep 19, 2013 at 17:26 comment added David Richerby No, no, no. Do not write "$O(k)$" when you mean $O(1)$. If you write "$O(k)$" to mean "bounded by a constant" in a context where $k$ already has a meaning, you've written the wrong thing: "A $k$-connected graph has at most $O(k)$ widgets" means something very different from "A $k$-connected graph has at most $O(1)$ widgets." If you write "$O(k)$" in a context where $k$ doesn't have a meaning, your reader's reaction will be "What on earth is $k$?"
Sep 19, 2013 at 8:26 history edited Juho CC BY-SA 3.0
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Sep 19, 2013 at 6:16 history answered Ryan Mathews CC BY-SA 3.0