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 September 15th, 2017, 02:00 AM #1 Senior Member   Joined: Oct 2011 Posts: 136 Thanks: 1 Fermat's theorem. Proof by 2 operations Fermat's theorem. Proof by 2 operations The essence of the contradiction. The hypothetical Fermat's equality is contradictory between the second digits of the factors of the number $А$. All calculations are done with numbers in base n, a prime number greater than 2. The notations that are used in the proofs: $A'$, $A''$ – the first, the second digit from the end of the number $A$; $A_2$ is the two-digit ending of the number A (i.e. $A_2=A$ mod $n^2$); Consider the Fermat’s equality in the base case (its properties 2°-3° are proved here: The Proof of Fermat's Last Theorem for the Base Case, viXra.org e-Print archive, viXra:1707.0410) for co-primes positive $A$, $B$, $C$; $A'≠0$, prime $n$, $n>2$: 1°) $A^n=C^n-B^n$ [$=(C-B)P$], where (as is known) 2°) $A'≠0$, $C-B=a^n$, $P=p^n$, $A=ap$, $p'=1$, $a'≠0$, $(a^n)'=a'$, $(a'^{n-1})'=1$ (Fermat's small theorem); 3°) $(A+B-C)_2=0$, from here 3a°) $(ap)_2=(a^n)_2$ and therefore 3b°) $p_2=(a^{n-1})_2$. 4°) If $p''=0$, then we multiply term by term equality 1° by such $g^{nn}$, that $p''≠0$. Properties 2°-3° are preserved, and we leave the notation of the numbers as before. And now the proof itself FLT. We represent the endings $a_2$ and $p_2$ in the form: $a2=(xn+a'^n)_2$ and $p_2=p''n+1$, where x and y are digits. First we substitute these values of the endings in the left-hand side of the equality 3a°: 5°) $[(xn+a'^n)(p''n+1)]_2=(a'^n)_2$, from here 5a°) $(a'np''n+xn)_2=0$, or (see 2°) $a'p''+x=0$ (mod n). Now, we substitute the value of $a_2$ in the right-hand side of the equality 3b°: 6°) $(xn+a'n)^{n-1}_2=[(n-1)xna'^{n-2}+1]2=(-nxa'^{n-2}+1)_2=(-nxa'^{n-1}/a'+1)_2$. From 3b° we have: 6a°) $-xa'^{n-1}/a'+p''=0$ (mod $n$), or $-xa'^{n-1}+a'p''=0$ (mod $n$), or $-x+a'p''=0$ (mod $n$), It follows from 5a° and 6a° that $x=y=0$, which contradicts to 2° and 4°. From this contradiction follows the truth of the FLT. (Mezos, France. 4 September 2017) September 16th, 2017, 03:44 AM #2 Math Team   Joined: Jan 2015 From: Alabama Posts: 3,264 Thanks: 902 What? That is not the way "proof by contradiction" works! "Proof by contradiction" starts by assuming that what is to be proved is not true then arrives at two statements that contradict one another. Since two contradictory statements cannot both be derived from a true statement, it follows that the original assumption, that what's to be proved is not true, must be false. And therefore that what was to be proved is true. Here, you don't do that. You assert 2° and 4° which you say have already been proved (I will grant you that) and then prove 5a° and 6a° which you say contradicts 2° and 4°. But you never assert that "Fermat's last theorem" is false to derive those. If you have done everything correctly, then you have disproved Fermat's last theorem! Oh, wait. I just realized this was posted by Victor Sorokin. What a waste of my time! Last edited by skipjack; February 27th, 2018 at 03:58 AM. September 17th, 2017, 01:30 AM   #3
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 Originally Posted by Country Boy What? That is not the way "proof by contradiction" works! "Proof by contradiction" starts by assuming that what is to be proved is not true then arrives at two statements that contradict one another. Since two contradictory statements cannot both be derived from a true statement, it follows that the original assumption, that what's to be proved is not true, must be false. And therefore that what was to be proved is true. Here, you don't do that. You assert 2° and 4° which you say have already been proved (I will grant you that) and then prove 5a° and 6a° which you say contradicts 2° and 4°. But you never assert that "Fermat's last theorem" is false to derive those. If you have done everything correctly, then you have disproved Fermat's last theorem! Oh, wait. I just realized this was posted by Victor Sorokin. What a waste of my time!
The proof is carried out by the method from the prive. You do not understand?

Last edited by skipjack; February 27th, 2018 at 04:00 AM. September 17th, 2017, 04:11 AM   #4
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 Originally Posted by victorsorokin The proof is carried out by the method from the prive. You do not understand?
Designer sunglasses? September 17th, 2017, 04:28 AM   #5
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 Originally Posted by victorsorokin The proof is carried out by the method from the privy. You do not understand?
ftfy September 23rd, 2017, 01:38 PM #6 Math Team   Joined: Jan 2015 From: Alabama Posts: 3,264 Thanks: 902 Ah! It took me a moment to figure out what "method from the prive" meant since I did not know what "prive" meant. Now, thanks to romsek, I realize it is a "method from the privy"! All is clear now. September 23rd, 2017, 01:47 PM #7 Senior Member   Joined: Sep 2015 From: USA Posts: 2,364 Thanks: 1270 we aim to please. ... especially in the privy February 26th, 2018, 07:51 PM #8 Senior Member   Joined: Oct 2011 Posts: 136 Thanks: 1 Dear sirs, R E M I N D that elementary proof of the FLT for a prime n>2 was found on December 1, 2017 and published on December 29, 2017 on the site: http://vixra.org/pdf/1712.0660v1.pdf Tools: Fermat's little theorem and the binomial theorem. The volume of the proof (without theory): 14 lines. In Russia, 20,500 schoolchildren and students read the proof (math.luga.ru : Форум - Главная страница). The author does not provide for any petitions either at the moment or in the future. The possible award will be given to the employee of the University who will make the official presentation of the proof (without the participation of the author, but consultations are guaranteed). Mezos (France) February 27, 2018 February 26th, 2018, 09:32 PM   #9
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 Originally Posted by victorsorokin Dear sirs, R E M I N D that elementary proof of the FLT for a prime n>2 was found on December 1, 2017 and published on December 29, 2017 on the site: http://vixra.org/pdf/1712.0660v1.pdf Tools: Fermat's little theorem and the binomial theorem. The volume of the proof (without theory): 14 lines. In Russia, 20,500 schoolchildren and students read the proof (math.luga.ru : Форум - Главная страница). The author does not provide for any petitions either at the moment or in the future. The possible award will be given to the employee of the University who will make the official presentation of the proof (without the participation of the author, but consultations are guaranteed). Mezos (France) February 27, 2018
Cool, now publish it in an actual math journal. April 19th, 2018, 05:31 PM #10 Newbie   Joined: Sep 2013 From: Reno,NV Posts: 14 Thanks: 1 Math Focus: Number Theory what does 2° mean? not the line but the "degree" symbol? Tags fermat, operations, proof, theorem Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Similar Threads Thread Thread Starter Forum Replies Last Post moussaid521 Number Theory 1 December 18th, 2016 09:02 PM mathsman1 Math 14 July 9th, 2016 05:45 PM MrAwojobi Number Theory 39 August 5th, 2014 10:34 AM MrAwojobi Number Theory 20 June 16th, 2014 08:32 PM jhon13 Algebra 4 May 24th, 2012 08:26 AM

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