A year later he formulated the ‘method of solving the homogeneous
differential equations of the first order’ He went further in a very short time
to the discovery of the ‘method of solving a linear differential equation of the
first-order’ How surprising is it that all these methods came from a single man
and that too within 25 years of the birth of differential equations In the old days, what we now call the ‘solution’ of a differential equation,
was used to be referred to as ‘integral’ of the differential equation, the word
being coined by James Bernoulli (1654 - 1705) in 1690