- #1

wrobel

Science Advisor

- 604

- 326

1) ##\|x(t)\|+\|\dot x(t)\|\to 0## as ##t\to\infty## and

2) for all ##t>0## one has ##\|x(t)\|\le c_1\|\dot x(t)\|##

Is it true that ##\|x(t)\|\le c_2 e^{-c_3t}##? Here ##c_i## are positive constants.