Exclamation point Memes

The mathematical notation equivalent of a heart attack. In math, "!" means factorial (multiply a number by all positive integers less than itself), but here it's being used like an exclamation point to emphasize inequalities. The author of this textbook is committing mathematical blasphemy that would make Euler roll in his grave. Imagine telling a mathematician "x > 0!" and watching them frantically calculate whether x is greater than 1 (since 0! = 1) before realizing you're just being dramatic about x being positive. Pure mathematical terrorism.