In 9.4.2, a fraction 3/4 is translated simply as "#3_/4". Similarly, in a physics book they are showing V0/V1. Would these be formatted the like ",v0_/,v1", or would the subscript numbers force a requirement of simple fraction indicators such as "?,v0_/,v1#"?
The determining factor when deciding whether to use Nemeth fraction indicators is how the fraction is printed. If the numerator is not raised and if the denominator is not lowered, then fraction indicators are not used. The presence of superscripts or subscripts does not affect this decision. In your example, if the "v"s are not raised or lowered from the base line of the surrounding text, you do not need to use fraction indicators.