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<p> Control theory was further advanced by <a href="page.php?w=Edward_Routh">Edward Routh</a> in 1874, <a href="page.php?w=Jacques_Charles_Fran%C3%A7ois_Sturm">Charles Sturm</a> and in 1895, <a href="page.php?w=Adolf_Hurwitz">Adolf Hurwitz</a>, who all contributed to the establishment of control stability criteria; and from 1922 onwards, the development of <a href="page.php?w=PID_control">PID control</a> theory by <a href="page.php?w=Nicolas_Minorsky">Nicolas Minorsky</a>.Although the most direct application of <a href="page.php?w=mathematical">mathematical</a></p><p>
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