What is the full-form of (Q.E.D) often used by mathematicians for signifying "Problem solved"?

Answer 1

The most common use in mathematical of Q.E.D. (it's usually written with periods for this purpose) means, broadly, "there, I've proved it." Q.E.D. is written at the end of a proof to show that the proof is complete and correct. Literally, it means 'which was to be demonstrated', and it's an abbreviation of the Latin phrase quod erat demonstrandum.

This Q.E.D. is also used in non-mathematical contexts, again indicating that the speaker thinks he or she has proved a point. Finally, it's used often in crossword puzzles to clue erat, a useful puzzle word since it has four common letters alternating vowels and consonants.

The other common QED is in physics, as an abbreviation for 'quantum electrodynamics', which is the quantum-mechanical theory of the electromagnetic field and its interaction with electrons and positrons. Richard Feynman wrote a book called QED: The Strange Theory of Light and Matter in 1985.

Some other expansions of QED that you'll probably never have to worry about are "quantitative evaluative device" and, as a reliability program, "Quality, Efficiency, Dependability."

Answer 2

My preference is the New World Translation of the Holy Scriptures but I always carry a King James Bible and when it comes to defending God's word any translation will do. Translators have changed some areas but aren't intelligent enough to change it everywhere it is in the scriptures, this is because the word of God is like a double edge sword if one area is compromised there are many other places the truth can be found. Take God's name [יהוה], it's called the Tretragrammaton, the New World Translation has it over 7000 times from cover and in truth [ALL] Bible translations have the Tretragrammaton [יהוה] over 7000 times they just have translated it GOD/LORD. This is really evident in all early translation but now the newer translations are changing GOD to God and LORD to Lord, Psalms 110:1 will render it this way, the Lord said on to my Lord where the way it's rendered now is the LORD said unto my Lord. This is happening right under the nose of so called Christians because the don't read the Bible yet they call themselves Christians. Soon there will be 7000 Lord/God instead of LORD/GOD, this is one of the main reasons we have false teachings like the Trinity, when you make the true God and his only begotten Son names the same then there is confusion and false teacher(Satan's agents) can easily pull the wool over the none believers eyes(2 Corinthians 4:4) among whom the god of this system of things has blinded the minds of the unbelievers, that the illumination of the glorious good news about the Christ, who is the image of God, might not shine through.

Answer 3

This is used in proving a theorem, not solving a problem. In your defense It could be pointed out that often times proving a theorem is difficult. However, it can be used in proofs which are simple and even, perhaps, unimportant. A different acronym is used for the constuction of mathematical objects, but this is not seen anymore since the old days of compass and staightedge mathematics is long gone.

Answer 4

Abbreviation for 'quod erat demonstrandum', which is Latin for 'that which was to be proved'. This is often written at the end of a proof, signifying a conclusion has been reached; we have proved what we were intending to.

Answer 5

It's an abbreviation of the Latin "quod erat demonstrandum" - translated into English this means "that will be shown".

Answer 6

It's an abbreviation for "quod erat demonstrandum",
Latin for "which was to be proved".

Answer 7

"quod erat demonstrandum"

Answer 8

Quite Easily Done ;-)