If you mean anupūrvī / ananupurvi in Jainism, it is not a mathematical term. It is a Jain karmic concept: a class of nāma-karma related to the soul’s movement after death and its rebirth in one of the four realms — deva, manusya, tiryanch, or naraka. ( jainknowledge.com)

So, there is no standard “mathematical finding” about anupūrvī in Jain scripture; it is explained spiritually and karmically, not as a math formula. ( jainknowledge.com)

If you meant a different Jain term, I can explain that too.