The termination for the user’s breach in the leaseback: an example of mathematical analysis of the law.

Quantitative methods and financial mathematics play a key role in aiding contracts, especially economic-mathematical tools. The coupling of jurisprudence and mathematics could lead to a prolific evolution of the law, especially in the economic aspects of juridical institutions. As regards the leaseback, the termination of a contract due to a breach by the user is analysed with particular reference to the contractual clause which includes the determination of the credit due to the leasing company on the basis of the payment of all rental accrued and accruing until the natural end of the contract, deposit included, after deducting the retail costs for the sale or re-leasing of the goods. The work will attempt to prove that the contractual interest rate, when the clause is activated, is different from the interest rate detectable once the value of the sale of the goods is subtracted from the credit due.