# Re: Characters consisting of vertical lines; Possible attempts to encode tally marks

From: Asmus Freytag (asmusf@ix.netcom.com)
Date: Wed Feb 28 2007 - 12:13:20 CST

• Next message: Kent Karlsson: "RE: Characters consisting of vertical lines; Possible attempts to encode tally marks"

On 2/28/2007 8:33 AM, Asmus Freytag wrote:
> On 2/27/2007 4:32 PM, Karl Pentzlin wrote:
>> ....
> barbara beeton from the American Mathematical Society (AMS) pointed
> out offline that item 1 has got the wrong distribution for a and b.
>> here's what it ought to be:
>>
>> a.) U+007C VERTICAL LINE (1 line)
>> U+2016 DOUBLE VERTICAL LINE (2 lines)
>> U+2AF4 TRIPLE VERTICAL BAR DELIMITER (3 lines)
The code point and name in Karl's original message do not correspond,
what is meant is U+2980 TRIPLE VERTICAL BAR DELIMITER and the character
at U+2AF4 is named TRIPLE VERTICAL BAR BINARY RELATION and is part of
the second set. U+2AFC is the N-ARY operator. (There are no n-ary
operators, it appears for 'divides' and 'parallel to').
>> b.) U+2223 DIVIDES (1 line)
>> U+2225 PARALLEL TO (2 lines)
>> U+2AFC LARGE TRIPLE VERTICAL BAR OPERATOR (3 lines)
>>
>> the items in a are used for delimiters or
>> fenceposts, as in
>> |x|, ||x||, |||x||| or < a | b >
>> in mathematical layout they increase in size as the expression gets
>> taller.
>>
>> the items in b are operators, always between
>> two elements, as in
>> x | y, x || y, or x ||| y
>> actually, they too should be able to get
>> taller if the elements they're between happen
>> to be something like fractions, but the meaning
>> and spacing are quite different from the others
A./

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