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<font face="Courier New">Samuel,<br>
<br>
In another e-mail that for some reason was not sent (and was
completely deleted...) I mentioned this page
<a class="moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/List_of_mathematical_symbols">https://en.wikipedia.org/wiki/List_of_mathematical_symbols</a> and
standard ISO 80000-2, which in its clause 9, item 2.9.5 says that
symbol for multiplication is either · or ×, and that they can be
omitted if no misunderstanding is possible, and presents two
examples of omission, one with space, such as <font face="Times
New Roman, Times, serif"><i>a</i> <i>b</i></font>, and one
without space, such as <font face="Times New Roman, Times, serif"><i>ab</i></font>
(I suppose this is when one has been already using <font
face="Times New Roman, Times, serif"><i>a</i></font> and <i><font
face="Times New Roman, Times, serif">b</font></i> or they are
immediately explained).<br>
<br>
I like the space more, it is more general and the only situation
where it would be ambiguous is between numbers, such as 1.234 58
(since the thousand separator is a short space according to the
ISO-BIPM GUM), but between numbers × is customary.<br>
<br>
Regards,<br>
<br>
Federico <br>
<br>
<br>
</font><br>
<div class="moz-cite-prefix">On 30/10/2019 18:43, Samuel Gougeon
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:bc25ceb6-6227-7a38-7b13-ef46ce731520@free.fr">
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<div class="moz-cite-prefix">Le 30/10/2019 à 21:51, Federico
Miyara a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:7ef33bf3-8911-f379-1f83-f20c147b4d0c@fceia.unr.edu.ar">
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<font face="Courier New">Dear all,<br>
<br>
I think a half-high (centered) dot "·" is a better (and more
standard) multiplication sign, it does not take much space and
it cannot be confused with the decimal separator ".", for
instance <br>
<br>
1 + Ts·s - A·s</font><font face="Courier New"><sup>2</sup></font><font
face="Courier New"> <br>
<br>
</font>1 + 2.·s - 0.27·s<sup>2</sup><br>
<br>
However, I think the decimal dot shouldn't be used in a block
diagram, its only use is to indicate they are real numbers, but
block diagrams never refer to integers so the decimal dot is
somewhat pedantic.<br>
</blockquote>
<p>?<br>
When a decimal number is integer, the dot is not displayed. With
your dot, it would give<br>
1 + 2·s - 0.27·s<sup>2</sup><br>
So the confusion could be only with cases like 1 + 2.55.s<br>
<br>
I was told that in formulae, the most standard is to use space
between multiplied symbols.<br>
This is what looks the most widely used. Please see for example<br>
<a class="moz-txt-link-freetext"
href="https://en.wikipedia.org/wiki/Autocorrelation"
moz-do-not-send="true">https://en.wikipedia.org/wiki/Autocorrelation</a>
or any other page using a lot of maths.<br>
</p>
<p>Output with \cdot :</p>
<p><img src="cid:part2.2971C6E1.7A50EE34@fceia.unr.edu.ar" alt=""
class=""></p>
<p>vs wider space<br>
</p>
<p><img src="cid:part3.F88CE46F.4084D6C3@fceia.unr.edu.ar" alt=""
class=""></p>
<p>or still wider:<br>
</p>
<p><img src="cid:part4.538BD273.D0BC6A07@fceia.unr.edu.ar" alt=""
class=""></p>
<br>
<br>
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</blockquote>
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