<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>I think that the definition of "n-ary operator" in §15.1 is
insufficient, because it fails to include the integral sign and
other similar signs that operate on continuous (i.e. non-discrete)
ranges of values. This is particularly unsatisfactory, given that
the default n-ary operator character is the integral sign (see
§22.1.2.20)! I therefore propose the following change to the
definition of "n-ary operator":</p>
<blockquote>
<p><b>n-ary operator</b> — A<strike><font color="#ff0000">n</font></strike>
<u><font color="#3366ff">mathematical</font></u> operator<font
color="#ff0000"><strike> </strike><strike>that involves n
terms when expanded</strike></font><span style="color:
rgb(0, 0, 0); font-family: -webkit-standard; font-size:
medium; font-style: normal; font-variant-caps: normal;
font-weight: normal; letter-spacing: normal; orphans: auto;
text-align: start; text-indent: 0px; text-transform: none;
white-space: normal; widows: auto; word-spacing: 0px;
-webkit-text-size-adjust: auto; -webkit-text-stroke-width:
0px; display: inline !important; float: none;"><font
color="#ff0000"><strike> </strike></font></span><font
color="#3366ff"><u>, </u></font><span style="color: rgb(0, 0,
0); font-family: -webkit-standard; font-size: medium;
font-style: normal; font-variant-caps: normal; font-weight:
normal; letter-spacing: normal; orphans: auto; text-align:
start; text-indent: 0px; text-transform: none; white-space:
normal; widows: auto; word-spacing: 0px;
-webkit-text-size-adjust: auto; -webkit-text-stroke-width:
0px; display: inline !important; float: none;"><u><font
color="#3366ff">typically a<u> single</u> operator
character, optionally<u> accompanied by</u> expressions of
a lower limit, an upper limit, or both</font></u></span>.
For instance, the following example uses the Unicode (ISO 10646)
summation sign (U+2211) which has the official name “N-ARY
SUMMATION”.</p>
<p>[example expression here]</p>
</blockquote>
<p>Francis<br>
</p>
</body>
</html>