WebMath: standard notation for negative numbers?

[Michael Gerard Richardson]

In response to Guillermo, a "raised" symbol is simply one placed
higher than its normal position relative to other characters.
The "subtraction" sign is that normally produced by the "minus
key".

I believe that character 150 is (officially) undefined in HTML
- however, in a couple of browsers I tried, this was interpreted
as an ordinary minus sign.  The effect of a raised minus sign
could be approximated by character 175 but this should probably
not be encouraged, as this is officially a macron (a horizontal
line appearing above a letter).  A quick perusal of the Unicode
mathematical symbols lists did not yield a specific symbol for
"raised minus".

Mike


>I'm very interested in this subject, but not being a native English speaker I am
>afraid I don't understand the discussion because I don't know what a "raised" sign
>is. Also, what is the difference with a "subtraction" sign?
>
>Is what you call the subtraction sign the minus key on every keyboard? Is the
>raised sign the HTML character (–) ?
>
>Thanks,
>
>Guillermo

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