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# Non degenerate representations for C*-algebras

Hi!

While studying C*-algebras I found 2 different definitions for non degenerate representations (-homomorphisms $\pi:\mathcal{A} \rightarrow B(\mathcal{h})$ where $\mathcal{A}$ is a C-algebra and $B(\mathcal{h})$ is the space of bounded linear operators on some Hilbert space $\mathcal{h}$):

1) For every non-zero $\xi \in \mathcal{h}$ there exists $a \in \mathcal{A}$ such that $\pi(a)\xi \neq 0$;

2) The set ${\pi(a)\xi \quad a \in \mathcal{A}, \xi \in \mathcal{h}}$ is dense in $\mathcal{h}$.

Are they equivalent?

Thanks, Alessandro