... for systems belonging to the singular.... : Quote by Vladimir I. Arnold

“ ... for systems belonging to the singular part of the stability boundary a small change of the parameters is more likely to send the system into the unstable region than into the stable region. This is a manifestation of a general principle stating that all good things (e.g. stability) are more fragile than bad things. It seems that in good situations a number of requirements must hold simultaneously, while to call a situation bad even one failure suffices. ”

Vladimir I. Arnold
  • From : Catastrophe Theory
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