[Tex/LaTex] equations automatically aligning to the left, how to centre them

Question

I was under the impression that equations align to the centre.
I'm using a pack \documentclass [twocolumn, final] {svjour3} which I am guessing is changing that.

So for example this:

\begin{equation}
\begin{split}
\label{eq_vector_value}
V_{w_{xy}} &= 1 - Norm(\delta(w_{x},w_{y})) \\
           &= \{V_{w_{xy}} \in \mathbb{R} \| 0 \geq V_{w_{xy}} \geq 1\}.
\end{split}
\end{equation}

Produces this:

This is a two column format, and I've been trying to make it centre.
Was I wrong to expect it would automatically align to the centre?
All equations in this particular article seem to align left.

Answer 1

That is the class default behavior. svjour3.cls includes

\PassOptionsToPackage{fleqn}{amsmath}}

So that the default

\documentclass[twocolumn, final]{svjour3}
\usepackage{amssymb}
\usepackage{mathtools}
\usepackage{lipsum} % just for the demo
\DeclareMathOperator{\Norm}{Norm}
\begin{document}
\lipsum[1-5] % Just for the demo
\begin{equation}
  \begin{split}
    \label{eq_vector_value}
    V_{w_{xy}} &= 1 - \Norm(\delta(w_{x},w_{y})) \\
    &= \{V_{w_{xy}} \in \mathbb{R} \| 0 \geq V_{w_{xy}} \geq 1\}.
  \end{split}
\end{equation}
\lipsum[5-15] % Just for the demo
\end{document}

produces :

(By the way, you should use a \DeclareMathOperator to display nicely your "Norm" in the equation.)