Set off of brought forward business losses

Yes ony if the newly reconstituted firm has same pan number as that of old and atleast 1 old partner should be partner in new firm.....both condition has to be satisfied.

Pls go throught Section 78 of Income Tax Act which provides that whenever there is a reconstitution of firm by way of retirement etc the firm can not carry forward the loss attributable to the retired partner. But this is not applicable to unabsorbed depreciation.