It is a myth prevailing in the Banking Software industry that interest term can just be replaced by Profit for Islamic Banking Software. Interest is a pre-defined, pre-determined additional amount (based on a rate) which the principal offerer demands whereas Profit is the expected amount on undertaking the risk of sale (uncertainty) as we know the profit is the reward for undertaking the risk of uncertainty.
So is there any way to distinguish Profit and Interest by defining mathematical functions?