Say I am trying to center a group of equations, written in separate lines, with equality sign aligned one below another, which are defined by: $f(r)+1=g(r^2)+1=O(r)$ as $r\to 1$ by first using the following sequence of commands for centering:


& f(r)+1 \\
&=g(r^2)+2 \\


followed by as $r\to 1$. But this put $r\to 1$ in a different line, not in the same line with O(r). I want the last line to be written as: $O(r)$ as $r\to 1$, centered in the middle of the page. How can I achieve this ? Thank you!

  • You can use O(r) \text{ as } r\to 1 as the final entry (and you don't want \\ after the last row). – David Carlisle Mar 31 '13 at 16:50

f(r)+1  &=g(r^2)+2 \\
        &=O(r) \qquad \text{as } r\to 1
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