History of Hindu Mathematics: A Source Book v2.c17.s6.4
History of Hindu Mathematics: A Source Book v2.c17.s6.4
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v2.c17.s6.4
Or, in other words, *saṅkramaṇa* is the solution of the simultaneous equations $x+y=a,$ $x-y=b.$ So Brahmagupta and Śrîpati are perfectly right in thinking that concurrence is truly a topic for algebra.