ελάχιστη ροή

Question

&Gamma;&epsilon;&iota;&alpha; &sigma;&alpha;&sigmaf;...&pi;&alpha;ί&rho;&nu;&omega; &alpha;&nu;&tau;&iota;&sigma;&upsilon;&lambda;&lambda;&eta;&pi;&tau;&iota;&kappa;ά (&delta;&epsilon;&nu; &xi;έ&chi;&alpha;&sigma;&alpha; &kappa;&alpha;&nu;έ&nu;&alpha;) &kappa;&alpha;&iota; &alpha;&upsilon;&tau;ή &tau;&eta; &phi;&omicron;&rho;ά &mu;&omicron;&upsilon; ή&rho;&theta;&epsilon; &epsilon;&lambda;ά&chi;&iota;&sigma;&tau;&omicron; &alpha;ί&mu;&alpha; (&kappa;&alpha;&phi;&epsilon;&kappa;ό&kappa;&kappa;&iota;&nu;&omicron;) &pi;&omicron;&upsilon; &kappa;&rho;ά&tau;&eta;&sigma;&epsilon; &mu;&iota;&alpha; &mu;έ&rho;&alpha; &chi;&omega;&rho;ί&sigmaf; &kappa;&alpha;&nu;&omicron;&nu;&iota;&kappa;ή &rho;&omicron;ή...&theta;&alpha; &mu;&pi;&omicron;&rho;&omicron;ύ&sigma;&epsilon; &nu;&alpha; &epsilon;ί&nu;&alpha;&iota; &alpha;&nu;&eta;&sigma;&upsilon;&chi;&eta;&tau;&iota;&kappa;ό? &nu;&alpha; &phi;&omicron;&beta;ά&mu;&alpha;&iota; &gamma;&iota;&alpha; &epsilon;&gamma;&kappa;&upsilon;&mu;&omicron;&sigma;ύ&nu;&eta;? (1 &epsilon;&pi;&alpha;&phi;ή &mu;ό&nu;&omicron; &chi;&omega;&rho;ί&sigmaf; &epsilon;&xi;&sigma;&pi;&epsilon;&rho;&mu;ά&tau;&iota;&sigma;&eta; &epsilon;&nu;&tau;ό&sigmaf;)...