Representation of square roots (from Re: Anything from the Symbol font to add along with W*dings?)

From: William_J_G Overington <>
Date: Sat, 13 Aug 2011 16:38:08 +0100 (BST)

On Saturday 13 August 2011, Jukka K. Korpela <> wrote:
> Traditional math notations require advanced typesetting and cannot be implemented in plain text; and when one needs to linearize such notations to plain text, radicals are among the minor issues—as √(a + b) with no vinculum would be quite acceptable, and so would sqrt(a + b).
I remember reading in the 1960s a publication from the Monotype Corporation in England that publicised the 4-line mathematics system for the typesetting of mathematics.
I seem to remember that that system included a character that one might describe today as like a U+005C REVERSE SOLIDUS yet with a steeper angle with respect to the horizontal. The idea was that in order to typeset the square root of an expression one did not use a line above the expression of which the square root was to be taken, one used a symbol like U+221A SQUARE ROOT, followed by the expression, followed by the steep-angled reverse solidus.
I have today found the following on the web about the 4-line mathematics system.
William Overington
13 August 2011
Received on Sat Aug 13 2011 - 11:10:12 CDT

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