nabmathematical termCHEMLA 2003: denominator of a fraction, e.g. the number two in the fraction 1/2. [Note that in Song times, and possibly before, another meaning of 母 became current: a "factor" of a number in the sense that the numbers 2 and 3 are factors of six.JIUZHANG 4.16: 開其母，報除。 "One extracts the root of the corresponding denominator, and divides in return.
Developed at the Center for Informatics in East-Asian Studies, Institute for Research in Humanities, Kyoto University, with support from the
Dean for Research, Department of East Asian Studies, and
Program in East Asian Studies, Princeton University.
Hosted by Princeton University, Department of East Asian Studies, in cooperation with Ruhr University Bochum, Center for the Study of Traditional Chinese Cultures .
Heidelberg University - Cluster of Excellence - Asia and Europe in a Global Context
and IKOS - University of Oslo