Q.E.D.

a mathmeticians way of saying “i win”
mathmetician: q.e.d., f-ckface.
an abbreviation of the latin phrase “quod erat demonstrandum”. it literally translates as “which was to be demonstrated”, and is a formal way of ending a mathematical, logical or physical proof. it’s purpose is to alert the reader that the immediately previous statement, which naturally was arrived at by an unbroken chain of logic, was the original statement that we were trying to prove.
“i refuse to prove that i exist,” says g-d, “for proof denies faith, and without faith i am nothing.”
“but,” say man, “the babel fish is a dead giveaway, isn’t it? it could not have evolved by chance. it proves you exist, and so therefore, by your own arguments, you don’t. qed.”
“oh dear,” says g-d, “i hadn’t thought of that” and promply vanishes in a puff of logic.” — douglas adams, from “a hitchiker’s guide to the galaxy”

proof that x + 3 = 0 if x = -3

x + 3 = (-3) + 3
= 0
qed
originally latin meaning “quod erat demonstrandum” or “which was to be shown or proven”, now used mainly by physics students to insult someone when something is proven wrong or false, typically with the words mother f-cker added for effect.
ha! your wrong.. qed mother f-cker!
1) from the latin ‘quod erat demonstrandum’, a mathematical term meaning that a proof is complete.

2) a mathematician’s way of saying “oh snap b-tch!”
“so you see, by this simple proof, your theory is wrong and mine is correct. qed!”
abbr. of quod erat demonstrandum, lit. “which was demonstrated”;
cf. res ipse loquitur (the thing speaks for itself), circ-mstantial evidence, the “smoking gun”
1. abbreviation of the latin phrase “quod erat demonstrandum; literally, “that which was to be demonstrated”. commonly used at the end of mathematical proofs to signify the proof is complete.

2. modern usage expands it to include the conclusion of any proof and is often used in attempts at ironic humor.

3. quantum electrodynamics.
1. if a=b and b=c then a=c. q.e.d.

2. beckham and ronaldo move to mls. mls attracts more fans and makes more money. more money attracts more quality players. more quality players make usa compet-tive. usa wins world cup. q.e.d.

formally used at the end of mathematical proofs to indicate their completion, informally to indicate an argument has been won. literally “which was to be demonstrated” (not just “which was demonstrated”).
… yeah well, i checked; they don’t make d-ld-s that big. q.e.d.

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