＼forall and ＼exists

from Introduction to Linear Algebra at the University of Tokyo ∀ and ∃ For every $x\in R$: “For all real numbers x,” “For any real number x chosen, always”

• I thought it was easier to understand when thinking of it as “choose” in the Epsilon-Delta Method of Math Girl (blu3mo)
• Flip the A in All and get $\forall$
  • I see (or do I?) (blu3mo)

$\exists y\in R,P(y)$: “There exists a real number y that satisfies the condition P.”

• Flip the E in exists and get $\exists$
  • Definitely Yo (blu3mo) (takker)
• It can also be written as $\exists y\in Rs.t.P(y)$
  • such that