English: This picture demonstrate two systems in the Roman numeral analysis to notate inversion. Using the number system, the base chord is denoted as I, the first inversion is denoted as I⁶, and the second inversion is denoted as I⁶₄. Using the letter system, the base chord is denoted as Ia, the first inversion is denoted as Ib, and the second inversion is denoted as Ic.
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