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{\bf T. Alderson}
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{\bf Extending Arcs: An Elementary Proof}
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In a finite projective plane $\pi$ we consider two configuration
conditions involving arcs in $\pi$ and show via combinatorial
means that they are equivalent.  When the conditions hold we are
able to obtain embeddability results for arcs, all proofs being
elementary. In particular, when $\pi=PG(2,q)$ with $q$ even we
provide short proofs of some well known embeddability results.

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