[Blindmath] Nemeth Code Questions

[John Gardner]

Allen, I am no expert on Nemeth, but I do remember how math appears
visually.  Generally when a sub or superscript has two letters or numbers
there is no comma separating them.  For numbers there is a space so that one
can tell the difference between, for example, 1 2 and 12.  It would be
perfectly okay to use a comma instead of that space, so I will guess that it
is done, but I never saw a comma between letters, although that would be
permissible.

Seems to me that the Nemeth rules should be the same whether or not there is
a comma in the visual representation.  The math is the same.

-----Original Message-----
From: Blindmath [mailto:blindmath-bounces at nfbnet.org] On Behalf Of ALLEN
PURVIN via Blindmath
Sent: Friday, November 07, 2014 8:10 AM
To: blindmath at nfbnet.org
Subject: [Blindmath] Nemeth Code Questions

Hi,
I have Nemeth Code questions concerning Rule XIII  § 78.  I am using the
1972 Revision. In my book, this section appears on pages 88-89. My questions
concern Nemeth commas used in superscripts or subscripts.
1. Why cant you use a Dot 6? Why must you use Dots 2-4-6?
2. In examples 2 and 3 on page 89, the first example says there is a space
after the comma and the second says there is no space after the comma, but I
can’t tell the difference. I was wondering if someone could explain the
difference to me.
For those without access to the manual I will try to explain what I am
talking about. Sorry for the confusion.
Example 1:
X with a subscript  of open parenthesis a comma b close parenthesis . 
The comma is not followed by a space in the ink print.
In Braille it is coded as X, subscript indicator, open parenthesis, a, Dots
2-4-6, b, close parenthesis.
Example 2:
X with a subscript of 1 comma 2. 
The comma is followed by a  space in the ink print.
In Braille it is coded as X, subscript indicator, 1, Dots 2-4-6, 2

Thanks!
Sorry again for the confusion.
- allen
(who is trying to get his Nemeth correct for Common Core Geometry)
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