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4_domaines_specialises:mathematiques:arguments_contre_eqnarray2 [2018/06/03 13:17]
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-title: Why not use `eqnarray`? 
-category: usage 
-permalink: /FAQ-eqnarray 
-The environment `eqnarray` is attractive for the 
-occasional user of mathematics in LaTeX documents: it seems to 
-allow aligned systems of equations.  Indeed it _does_ supply such 
-things, but it makes a serious mess of spacing.  In the system: 
-  a & = & b + c \\ 
-  x & = & y - z 
-the spacing around the "=" signs is _not_ that defined in the 
-metrics for the font from which the glyph comes — it's 
-`\arraycolsep`, which may be set to some very odd value for reasons 
-associated with real arrays elsewhere in the document. 
-The user is far better served by the AMSLaTeX bundle, which 
-provides an `align` environment, which is designed with 
-the needs of mathematicians in mind (as opposed to the convenience of 
-LaTeX programmers).  For this simple case (`align` and 
-other AMSLaTeX alignment environments are capable of far greater 
-things), code as: 
-  a & = b + c \\ 
-  x & = y - z 
-The matter is discussed in more detail in a  
-[PracTeX journal paper](https://tug.org/pracjourn/2006-4/madsen/madsen.pdf) 
-by Lars Madsen; Stefan Kottwitz offers a  
-[TeX blog entry](http://texblog.net/latex-archive/maths/eqnarray-align-environment/) 
-which includes screen shots of the output, convincingly demonstrating 
-the problem. 
4_domaines_specialises/mathematiques/arguments_contre_eqnarray2.1528031869.txt.gz · Dernière modification: 2018/06/03 13:17 de joseph.wright
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