SIAM Journal on Applied Mathematics, Vol. 30, No. 2 (Mar., 1976), pp. 240-247 (8 pages) A technique is presented for generating approximate stability diagrams and solutions to the Mathieu equation ...
"Even the +, −, =, and x signs we take for granted only came into widespread use in the 17th century. Which means that the earlier algebraists we know of … all had expressed their equations mostly in ...