22

Is there an intelligent way to left-align the parts right of & of the two cases environments shown below (if x >= 0, otherwise, if y < 0, otherwise). I wonder if there is a better way than using manual spaces:

\begin{align*}
 u(x) &=
  \begin{cases}
   0        & \text{if } x \geq 0 \\
   1        & \text{otherwise}
  \end{cases}
  \\
 \tau &=
  \begin{cases}
   a+b+c+d  & \text{if } y < 0 \\
   1        & \text{otherwise}
  \end{cases}
\end{align*}

alt text

  • 3
    The easiest solution I can come up with is to use the mathtools package and use something like \mathrlap0\hphantom{a+b+c+d} in place of your 0. But that's playing with manual spacing, I suppose. – TH. Sep 21 '10 at 2:04
  • 1
    You can use the solutions to an earlier question, just exchanging the order of the statements. – Caramdir Sep 21 '10 at 2:09
  • Both great. Thanks. Much better than fiddling with manual \quad-s etc. – st12 Sep 21 '10 at 2:16
  • 1
    @TH, @Caramdir: Why not post actual answers? – SamB Sep 27 '10 at 21:14
  • @TH, @Caramdir: If you can put up an answer or two, as @SamB suggests, then we can shift this qn off the "Unanswered" list. – Charles Stewart Oct 5 '10 at 7:54
14

You can use the solutions to an earlier question, just exchanging the order of the statements.

Another solution is to use the mathtools package and use something like \mathrlap0\hphantom{a+b+c+d} in place of your 0.

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