I'd like to align some equations in Latex using the AMS packages. Each equation has two equal signs that need to be aligned. So something in the line of
A开发者_C百科 = B = C
D = E = F
I've tried using the align-environment like this
\begin{align}
A &= B &= C \\
D &= E &= F
\end{align}
This works in principle (it aligns), however it adds ridiculously large spaces before the second equal sign in each line. But I just want the line to runs as if there was no additional alignment tab. Only when I replace for example "B" by "BBB" I want the equal sign before "F" to shift to right the exact amount of space.
Could anyone help me out on that one? It's kind of driving me crazy since I don't get the idea of that strange behavior and I just can't find any solution. Maybe alignat could help, but I don't really get how that environment works or in how it differs from normal align.
Cheers, Oliver
This should work:
\begin{alignat}{2}
A &= B & &= C \\
D &= E & &= F
\end{alignat}
From ams guide:
A variant environment alignat allows the horizontal space between equations to be explicitly specified. This environment takes one argument, the number of “equation columns”: count the maximum number of &s in any row, add 1 and divide by 2.
Its not exactly intended for what you are trying to do, but since align insists on adding space... The idea behind align is:
l&=r & l&=r \\
l&=r & l&=r
One '&' per function, and a '&' between functions.
I would hope there is a better solution though.
(6½ to 8 years later)
What about using array
with a custom separator?
\begin{array}{r@{\ }c@{\ }l}
A &= B &= C \\
D &= E &= F
\end{array}
What about the below? They produce aligned "=" signs for me...
\begin{tabular}{lllll}
A & = & B & = & C \\
D & = & E & = & F \\
\end{tabular}
\begin{tabular}{lllll}
A & = & BBB & = & C \\
D & = & E & = & F \\
\end{tabular}
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