less-than or equal to with dot in the less-than part?

[philip chastney]

there is another issue with these symbols  --  they appear among the mathematical symbols but, in the reference given, they are used as delimiters

I know of no other application for these symbols other than as delimiters  --  are they used as mathematical operators? 

and how, in general, would one define the properties for characters which may sometimes be operators, and sometimes be delimiters?

/phil

--------------------------------------------
On Wed, 10/8/16, Asmus Freytag (c) <asmusf at ix.netcom.com> wrote:

 Subject: Re: less-than or equal to with dot in the less-than part?
 To: unicode at unicode.org
 Date: Wednesday, 10 August, 2016, 4:16 PM
 
 On 8/10/2016 5:06 AM,
 Andrew West wrote:
 > On 10 August 2016 at
 12:21, Costello, Roger L. <costello at mitre.org>
 wrote:
 >> Do you know if there is
 another version of the symbol, but with a straight equals
 sign rather than a slanted equals sign? (The book that I
 referred to uses a straight equals sign not a slanted equals
 sign)
 > No, but there are lots of
 standardized variants for mathematical glyph
 > variants of this sort (see first section
 of
 > http://www.unicode.org/Public/UNIDATA/StandardizedVariants.txt),
 so
 > you could ask the UTC to define two
 more mathematical standardized
 >
 variants:
 >
 > 2A7F
 FE00; with straight equal; # LESS-THAN OR SLANTED EQUAL TO
 WITH DOT INSIDE
 > 2A80 FE00; with
 straight equal; # GREATER-THAN OR SLANTED EQUAL TO
 > WITH DOT INSIDE
 >
 > Then all you would need is to get someone
 to support the new
 > standardized
 variants in a math font.
 >
 
 Unicode does not use
 standardized variants for that particular 
 distinctions in the undotted part of that
 family of symbols.
 
 A./