Friday, 18 June 2010

co.combinatorics - Notation for the all-ones vector

What's the most common way of writing the all-ones vector, that is, the vector, when projected onto each standard basis vector of a given vector space, having length one? The zero vector is frequently written $vec{0}$, so I'm partial to writing the all-ones vector as $vec{1}$, but I don't know how popular this is, and I don't know if a reader might confuse it with the identity matrix.



I'm writing for a graph theory audience, if that helps pick a notation.

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