User blog comment:Wythagoras/Strength of Hierarchical Nested Subscript Array Notation/@comment-11227630-20130730115509

Why the [1 /[1/2] 2] separator (which is [1 [1/2//2] 2]) have higher level than the [1 /[1~2] 2] separator (which is [1 [1~2//2] 2])?