I would like to know what these strange numbers below this legato section of the violin solo sheet of Sarasate's "Zigeunerweisen" ("Gypsy Airs"), Op. 20, measure 7 denote. I know the Roman numeral IV means G string but the 4 & 6 below the A and G make no sense. Can someone please help me — whomever is familiar with "Gypsy Airs".
I am talking about the circled numbers we can get to the 6 on the other note later