Among all of the mathematical disciplines the theory of differential equations is the most important... It furnishes the explanation of all those elementary manifestations of nature which involve time. — Sophus Lie Copy Share Image
It may be said that the conceptions of differential quotient and integral, which in their origin certainly go back to Archimedes, were introduced into… — Sophus Lie Copy Share Image
Among all of the mathematical disciplines the theory of differential equations is the most important... It furnishes the explanation of all those elementary manifestations… — Sophus Lie Copy Share Image
