Περίοδος και λίγη ροή

Question

&Kappa;&alpha;&lambda;&eta;&sigma;&pi;έ&rho;&alpha; &kappa;&alpha;&iota; &sigma;&upsilon;&gamma;&nu;ώ&mu;&eta; &gamma;&iota;&alpha; &tau;&eta;&nu; &epsilon;&nu;ό&chi;&lambda;&eta;&sigma;&eta; &kappa;&alpha;&iota; &pi;ά&lambda;&iota;.  &Epsilon;ί&chi;&alpha; &epsilon;&pi;&alpha;&phi;ή 1-2 &mu;έ&rho;&epsilon;&sigmaf; &mu;&epsilon;&tau;ά &tau;&eta;&nu; &omega;&omicron;&rho;&rho;&eta;&xi;ί&alpha; &mu;&omicron;&upsilon;, &alpha;&lambda;&lambda;ά &phi;&alpha;&iota;&nu;&omicron;&mu;&epsilon;&nu;&iota;&kappa;ά &tau;&omicron;&upsilon;&lambda;ά&chi;&iota;&sigma;&tau;&omicron;&nu; &delta;&epsilon;&nu; &epsilon;ί&chi;&alpha;&mu;&epsilon; &kappa;ά&pi;&omicron;&iota;&omicron; &alpha;&tau;ύ&chi;&eta;&mu;&alpha;.. &Sigma;ή&mu;&epsilon;&rho;&alpha;, 9 &mu;έ&rho;&epsilon;&sigmaf; &mu;&epsilon;&tau;ά &tau;&eta;&nu; &epsilon;&pi;&alpha;&phi;ή, &epsilon;ί&chi;&alpha; &alpha;ί&mu;&alpha; &gamma;&iota;&alpha; &kappa;ά&pi;&omicron;&iota;&epsilon;&sigmaf; ώ&rho;&epsilon;&sigmaf;, &tau;ώ&rho;&alpha; έ&chi;&epsilon;&iota; &sigma;&tau;&alpha;&mu;&alpha;&tau;ή&sigma;&epsilon;&iota;.  &Epsilon;&pi;ί&sigma;&eta;&sigmaf;, &alpha;&pi;ό &chi;&theta;&epsilon;&sigmaf; &epsilon;ί&mu;&alpha;&iota; &kappa;&rho;&upsilon;&omega;&mu;έ&nu;&eta; &kappa;&alpha;&iota; &pi;&alpha;ί&rho;&nu;&omega; &pi;&alpha;&upsilon;&sigma;ί&pi;&omicron;&nu;&alpha;.  &Mu;&pi;&omicron;&rho;&epsilon;ί &nu;&alpha; έ&chi;&epsilon;&iota; &epsilon;&pi;&eta;&rho;&epsilon;ά&sigma;&epsilon;&iota; &alpha;&upsilon;&tau;ό; &Sigma;&epsilon; &pi;&epsilon;&rho;ί&pi;&tau;&omega;&sigma;&eta; &pi;&omicron;&upsilon; &eta; &pi;&epsilon;&rho;ί&omicron;&delta;&omicron;&sigmaf; &delta;&epsilon;&nu; &sigma;&upsilon;&nu;&epsilon;&chi;&iota;&sigma;&tau;&epsilon;ί, &pi;ό&tau;&epsilon; &mu;&pi;&omicron;&rho;ώ &nu;&alpha; &kappa;ά&nu;&omega; &tau;&epsilon;&sigma;&tau;/ &chi;&omicron;&rho;&iota;&alpha;&kappa;ή &kappa;&alpha;&iota; &nu;&alpha; &chi;&epsilon;&iota; &alpha;&xi;&iota;ό&pi;&iota;&sigma;&tau;&omicron; &alpha;&pi;&omicron;&tau;έ&lambda;&epsilon;&sigma;&mu;&alpha;;