# svjour3 undefined control sequence

I am using `svjour3` template to submit a paper. My problem is LaTeX faces these errors:

``````Undefined control sequence
\mathbb{} .
``````

Similarly

`````` Undefined control sequence
\mathfrac{} .
``````
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Load the `amssymb` package for `\mathbb` and `\mathfrak` (sic!).

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@ lockstep perfect now the environment align gives me another trouble what should i do? –  MON Jul 14 '11 at 18:56
@MON: Thanks for accepting my answer, but please also upvote it (this has to be done separately from accepting it). –  lockstep Jul 14 '11 at 18:56
I wish I could up-vote it several times ;) –  MON Jul 14 '11 at 18:57
@MON: For `align` load the `amsmath` package. –  lockstep Jul 14 '11 at 18:57
Awesome! thanks a lot. –  MON Jul 14 '11 at 19:00