Report - analysis - sitio.df.uba.arty j X Y t x i+1 - t i x – tx i-1 t y j – t j-1 ty j+1 - t y j time τ ij = min{t x i+1 - t x i ; t x i – t i-1 ; t y j+1 - t y j ; t y j – t y j-1}

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