Différences

Ci-dessous, les différences entre deux révisions de la page.

--- 3_domaines_specialises:mathematiques:arguments_contre_eqnarray2 [2018/12/04 01:07]
jejust
+++ — (Version actuelle)
@@ Ligne 1: / Ligne 1: @@
-====== Why not use `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:
-<code latex>
-\begin{eqnarray}
-  a & = & b + c \\
-  x & = & y - z
-\end{eqnarray}
-</code>
-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
-[[ctanpkg>amsmath|amsmath]] package, 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 [[ctanpkg>amsmath|amsmath]]
-alignment environments are capable of far greater
-things), code as:
-<code latex>
-\begin{align}
-  a & = b + c \\
-  x & = y - z
-\end{align}
-</code>
-The matter is discussed in more detail in a
-[[https://tug.org/pracjourn/2006-4/madsen/madsen.pdf|PracTeX journal paper]]
-by Lars Madsen; Stefan Kottwitz offers a
-[[http://texblog.net/latex-archive/maths/eqnarray-align-environment/|TeX blog entry]]
-which includes screen shots of the output, convincingly demonstrating
-the problem.
------
-//Source:// [[faquk>FAQ-eqnarray|Why not use `eqnarray`?]]
-{{htmlmetatags>metatag-keywords=(LaTeX,usage)
-metatag-og:title=(Why not use `eqnarray`?)
-metatag-og:site_name=(FAQ LaTeX francophone)
-}}