A paper on an equation useful in finance has been retracted after editors discovered an “identical” version had been published in another journal.
The paper, “On the Parametric Interest of the Black-Scholes Equation,” was published in the Thai Journal of Mathematics. According to the introduction, that equation has a practical use:
In financial mathematics, the famous equation named the Black-Scholes equation plays an important role in solving the option price of stocks
(According to The Guardian, it was “The mathematical equation that caused the banks to crash.”)
Here’s the retraction note in full: