Is there an equivalent `align`

environment in `lncs`

that has support for multiline equations? I have such an equation that I want to include in my text, and naively injecting `\\`

separators into an equation environment doesn't do the trick. For reference, here is the code:

```
\begin{equation}
c(\beta, \Sigma, \Pi, \Lambda, T) = C_t(Tr(\beta T)^{-1}) + \\
C_t(\mathbf{A} \times Tr(\beta, T)) + C_t((\mathbf{A} \times Tr(\beta, T))^{-1}) + \\
C_t(Tr(\beta, T)) + 2 \times (C_i(\beta, \Sigma, \Pi, \Lambda) + C(\mathbf{A}) + HW(c))
\end{equation}
```

## Best Answer

I cannot find a class or package named

`lncs`

, did you mean`llncs.cls`

?I can find only one inconsistency between

`llncs.cls`

and`amsmath.sty`

: When`amsmath`

tries to redefine math accents, it complains that it cannot redefine`\vec`

. This is only a warning and can be safely ignored if you don't use`\vec`

or are satisfied with the`llncs`

definition of`\vec`

.You can avoid even that warning if you change the loading order:

You will then get the

`llncs`

definition.If neither of these works for you, perhaps you have a different version of

`llncs`

. In that case you should supply a link to the version you use. Mine gives its date and version as 2013/09/27 v2.18.