In reply to @SLSingh
@SLSingh I think maybe not: Cajori says the same symbol was used for subtraction earlier
In reply to @christianp
@SLSingh twitter won't let me paste a tripod link (?!!), so here's an attempt at hiding it in bitly: bit.ly/1Ce4CoJ
In reply to @SLSingh
@SLSingh I think maybe not: Cajori says the same symbol was used for subtraction earlier
In reply to @christianp
@SLSingh twitter won't let me paste a tripod link (?!!), so here's an attempt at hiding it in bitly: bit.ly/1Ce4CoJ