History of Hindu Mathematics: A Source Book v1.c7.s12.60

v1.c7.s12.60

² The occasional use by Al-Battani (929) of the Arabic negative *lâ*, to indicate the absence of minutes (or seconds), noted by Nallino (*Verhandlungen des 5 congresses der Orientalisten*, Berlin, 1882, Vol. II, p. 271), is similar to the use of the zero dot to denote the negative.