Use gathered: documentclass{article} usepackage{amsmath} usepackage{feynmp-auto} % or feynmf begin{document} begin{fmffile}{test} begin{equation} begin{gathered} begin{fmfgraph*}(65,50) fmfleft{i1,i2} fmfright{o1,o2} fmf{plain}{i1,v,o1} fmf{plain}{i2,v,o2} end{fmfgraph*} end{gathered}=-ilambda end{equation} …
Dirty hack: documentclass{beamer} begin{document} begin{frame} begin{itemize} item a item a item[$Rightarrow$hskip-0.15cm] a end{itemize} end{frame} end{document} Not so hacky: documentclass{beamer} usepackage{calc} …
Wouldn’t it be easier to use a chemistry package like mhchem (together with the already proposed amsmath) instead of tensor? …
Most of your problems came from shortstack, which was placing the baseline at the bottom. I replaced it with parbox, …
If a multicolumn is wider than the columns it spans, all the extra width goes in the last column, so …
Referencing my chat message from 2013-04-05, here is the definition of the cases environment that accepts one optional argument, the …
You can put the text in box of fixed size hidden in a box of zero width. Here I have …
Werner beat me by 56 seconds but an alternative scheme is documentclass{article} usepackage{mathtools} begin{document} begin{align*} d_i(g_n,ldots,g_0) &= begin{cases} (d_0g_ng_{n-1},g_{n-2},ldots,g_0),& text{if …
the initial markup is incorrect (but not flagged as an error by latex) raggedright and raggedleft should be used before …
The solution to the question pointed out by Barbara Beeton is close to the right idea. In fact, you could …