The ``Equation'' environment is defined as having an optional
argument used as a label. The ``MultiLine'' environment is
used for long formulas that don't fit on a single line, but no
ampersand mark is needed, since all lines but the first are
authomatically indented by a predefined amount of space. The
``System'' environment is for grouping a set of equations
with one number and with an enclosing left brace. These
two environments also have an optional argument used as a
label. All the above environments have a *-form, which does
not generate a number.
|