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[MUG] MathML Non-standard notation
| [MUG] MathML Non-standard notation |
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Author: Dale Alspach
Posted: 18/09/2001 17:05:57 GDT
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>> From: Dale Alspach "alspach"
I just installed Maple 7 in order to see how the MathML with WebEQ output
worked. I was surprised to see left and right hand limits rendered with
slanted arrows rather than with the standard notation of superscripted plus
or minus. Because of the extra geometrical content, the slant arrows are
possibly ``parsed'' more quickly by humans, but it has the big disadvantage
for class use of introducing another notation which exists only(?) in Maple
produced web pages.
I thought the point of (presentation) MathML was to duplicate standard
notation in web pages.
Dale Alspach
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To: "maple-list"
Subject: More MathML oddities
From: Dale Alspach "alspach"
I have come accross a few more problems with MathML export to MathML with
WebEQ in Maple 7.
First an apply f:=x->x^2 gets rendered in html
as f:=lambda (x ,x^2 ) in the Maple
output display.
Second expressions that I have typed in as displayed text (<f5>...<f5>
not maple input or output) are getting partially simplified, so that the
appearance in the worksheet (.mws) is different than in the exported
worksheet. (.html) This is particularly annoying for class use since
simplifications destroy information. Thus far the simplifications are
minor (combining terms).
limit((58*(1+h)-.83*(1+h)^2-(58-.83))/h,h = 0);
is getting replaced as though I had entered
limit((.83 +58*h-.83*(1+h)^2)/h,h = 0);
It looks like the export is being done using some internal format rather
than translating the displayed worksheet to html.
Dale Alspach
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| [MUG] Re: MathML Non-standard notation |
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Author: Maple User Group
Posted: 24/09/2001 16:40:24 GDT
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>> From: Maple User Group "maple_gr"
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Date: Wed, 19 Sep 2001 16:30:10 +0100
From: "Dr Francis J. Wright" "F.J.Wright"
To: "maple-list" Dale Alspach "alspach"
Subject: MathML Non-standard notation
Dale Alspach wrote:
>
> I just installed Maple 7 in order to see how the MathML with WebEQ output
> worked. I was surprised to see left and right hand limits rendered with
> slanted arrows rather than with the standard notation of superscripted plus
> or minus. Because of the extra geometrical content, the slant arrows are
> possibly ``parsed'' more quickly by humans, but it has the big disadvantage
> for class use of introducing another notation which exists only(?) in Maple
> produced web pages.
>
> I thought the point of (presentation) MathML was to duplicate standard
> notation in web pages.
Some details of the display of MathML are at the discretion of the
renderer you use, and are nothing to do with either MathML or Maple. I
suggest you try a different rendered, such as the IBM techexplorer web
browser plug-in. I was quite impressed with that, although it was about
a year ago when I last used it in earnest and it's probably even better
by now! There is a free version, which I find adequate. The URL is
http://www.software.ibm.com/techexplorer/
Francis
--
Dr Francis J. Wright | mailto: "F.J.Wright"
School of Mathematical Sciences | tel: (020) 7882 5453 (direct)
Queen Mary, University of London | fax: (020) 8981 9587 (dept.)
Mile End Road, London E1 4NS, UK | http://centaur.maths.qmw.ac.uk/
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Date: Thu, 20 Sep 2001 14:18:24 -0700 (PDT)
From: David Casperson "casper"
To: "maple-list"
Subject: MathML Non-standard notation
On Tue, 18 Sep 2001, Dale Alspach wrote:
> Date: Tue, 18 Sep 2001 12:05:57 -0400 (EDT)
> Subject: [MUG] MathML Non-standard notation
>
>
> >> From: Dale Alspach "alspach"
>
> I just installed Maple 7 in order to see how the MathML with WebEQ output
> worked. I was surprised to see left and right hand limits rendered with
> slanted arrows rather than with the standard notation of superscripted plus
> or minus. Because of the extra geometrical content, the slant arrows are
> possibly ``parsed'' more quickly by humans, but it has the big disadvantage
> for class use of introducing another notation which exists only(?) in Maple
> produced web pages.
In this case Maple is attempting to conform to someone else's standard,
and that standard suggests the use of the funny limit arrows. Your
point about classroom usage is right on the mark though.
In general, class-room usage itself is not standard. Many texts at the
level of pre-calcus and lower use the phrase "natural number" to refer
to the positive integers, and label the non-negative integers as "whole
numbers"; whereas most university-level math texts identify the concepts
of natural number with non-negative integer.
Similarly, half open intervals are sometimes denoted [a,b) and sometimes
[a,b[. My point is that the MathML standard needs to choose between
standard notations. Admittedly angled arrows in limit notation are
pretty bizarre, at least by the standards of the North American
English-speaking mathematical community. (I don't know about others.)
> I thought the point of (presentation) MathML was to duplicate standard
> notation in web pages.
Yes, but there isn't ONE standard. In the case under discussion, Maple
conforms to the MathML suggested presentation. It probably ought'n't.
David
--
Dr. David Casperson | "casper"
Department of Mathematics & Computer Science | (250) 960-6672
Faculty of Science |
College of Science and Management |
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