Divide by Zero (allthetropes.org)
The characters did something so incredibly wrong that reality itself couldn’t handle it. Could be the result of a Time Paradox, the result of a Yin-Yang Clash, or an unstoppable force meeting an immovable object, or the risk behind the Forbidden Chekhov’s Gun.- Division by zero (Wikipedia)
In mathematics, division by zero, division where the divisor (denominator) is zero, is a unique and problematic special case. Using fraction notation, the general example can be written as a/0 where a is the dividend (numerator).