A Proposed Proof of The ABC Conjecture
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1 Noname manuscript No. (will be inserted by the editor) A Proposed Proof of The ABC Conjecture Abdelmajid Ben Hadj Salem Received: date / Accepted: date Abstract In this paper, from a, b, c positive integers relatively prime with c = a + b, we consider a bounded of c depending of a, b, then we do a choice of K(ɛ) and finally we obtain that the ABC conjecture is true. Four numerical examples confirm our proof. Keywords Elementary number theory real functions of one variable. Mathematics Subject Classification (2010) 11AXX 26AXX To the memory of my Father who taught me arithmetic. 1 Introduction and notations Let a a positive integer, a = i aαi i, a i prime integers and α i 1 positive integers. We call radical of a the integer i a i noted by rad(a). Then a is written as: a = i a αi i = rad(a). i a αi 1 i (1) We note: µ a = i a αi 1 i = a = µ a.rad(a) (2) The ABC conjecture was proposed independently in 1985 by David Masser of the University of Basel and Joseph Œsterlé of Pierre et Marie Curie University (Paris 6) [1]. It describes the distribution of the prime factors of two integers with those of its sum. The definition of the ABC conjecture is given above: Abdelmajid Ben Hadj Salem 6, Rue du Nil, Cité Soliman Er-Riadh 8020 Soliman Tunisia abenhadjsalem@gmail.com
2 2 Abdelmajid Ben Hadj Salem Conjecture 1 ( ABC Conjecture): Let a, b, c positive integers relatively prime with c = a + b, then for each ɛ > 0, there exists K(ɛ) such that : c < K(ɛ).rad(abc) 1+ɛ (3) This paper about this conjecture is written after the publication of an article in Quanta magazine about the remarks of professors Peter Scholze of the University of Bonn and Jakob Stix of Goethe University Frankfurt concerning the proof of Shinichi Mochizuki [2]. I try here to give a simple proof that can be understood by undergraduate students. 2 Proof of the conjecture (1) Let a, b, c positive integers, relatively prime, with c = a + b. We suppose that b < a, we can write that a verifies: c = a + b c(a b) = a 2 b 2 < a 2 = c < a2 a b We can write also: c < a2.k(ɛ).rad(abc)1+ɛ a b K(ɛ).rad(abc) 1+ɛ (5) We propose the constant K(ɛ) depending of ɛ as : (4) K(ɛ) = 2 ɛ 2 (6) it is a decreasing function so that lim ɛ 0 K(ɛ) = + and lim ɛ + K(ɛ) = 0. We write (5) as: c < a2 ɛ 2 2R(abc) 1+ɛ.K(ɛ).rad(abc)1+ɛ (7) It is known that 2 rad(q) for q a positive integer, then 2 3 rad(abc) = 1 rad(abc) As 1 + ɛ < 1 + a2 ɛ, we obtain: Let: c < a2 ɛ a2 ɛ.k(ɛ).rad(abc)1+ɛ (8) G(ɛ, a, b) = a2 ɛ 2 Then, equation (8) is written as: 2 4+3a2 ɛ (9) c < G(ɛ, a, b).k(ɛ).rad(abc) 1+ɛ (10) If we can give a proof that G(ɛ, a, b) < 1 independently of a, b, ɛ, we will obtain: c < G(ɛ, a, b).k(ɛ).rad(abc) 1+ɛ < K(ɛ).rad(abc) 1+ɛ (11) then the ABC conjecture holds with proposing the expression of the constant K(ɛ) = 2 ɛ 2.
3 A Proposed Proof of The ABC Conjecture The Proof We write: G(ɛ, a, b) = a2 ɛ a2 ɛ < 1 (a b)2 4+3a2ɛ a 2 ɛ 2 > 0 As a > b, the minimum value of a b is equal to 1, then we must verify if : We call: a2ɛ a 2 ɛ 2 > 0 or 16e (3a2ɛ)Log2 a 2 ɛ 2 > 0 (12) φ(ɛ) = 16e (3a2 ɛ)log2 a 2 ɛ 2 φ (ɛ) = 2a 2 (24e 3a2 ɛlog2 Log2 ɛ) (13) φ (ɛ) = 2a 2 (72a 2 (Log2) 2 e 3a2 ɛlog2 1) > 0 ɛ > 0 and a 2 (14) If we write the table of variations of the function φ when ɛ [0, + [, we obtain successively φ (ɛ) > 0, φ (ɛ) > 0 and φ(ɛ) > 0 for a 2, we deduce that ɛ > 0, a 2 : 16e (3a2 ɛ)log2 a 2 ɛ 2 > 0 = (a b)2 4+3a2ɛ a 2 ɛ 2 > 0 = (a b)2 4+3a2ɛ > a 2 ɛ 2 = 1 > Then we obtain the important result of the paper: Q.E.D a 2 ɛ 2 = G(ɛ, a, b) < 1 (15) (a b)2 4+3a2 ɛ c < K(ɛ).rad(abc) 1+ɛ ɛ > 0 with the constant K(ɛ) = 2 ɛ 2 (16) 3 Examples In this section, we are going to verify some numerical examples. 3.1 Example of Eric Reyssat We give here the example of Eric Reyssat [1], it is given by: = 23 5 = (17) a = µ a = 3 9 = and rad(a) = 3 109, b = 2 µ b = 1 and rad(b) = 2,
4 4 Abdelmajid Ben Hadj Salem c = 23 5 = rad(c) = 23. Then rad(abc) = = For example, we take ɛ = 0.01, the expression of K(ɛ) becomes: Let us verify (11): K(ɛ) = 2 ɛ 2 = (18) c < K(ɛ).rad(abc) ɛ = c = < ( ) 1.01 = Hence (11) is verified < (19) 3.2 Example of A. Nitaj Case 1 The example of Nitaj about the ABC conjecture [3] is: a = = rad(a) = (20) b = = rad(b) = (21) c = = rad(c) = (22) rad(abc) = = (23) we take ɛ = 100 we have: c < K(ɛ).rad(abc) 1+ɛ = < ( ) 101 = < e (24) then (11) is verified Case 2 We take ɛ = = 10 6, then: c < K(ɛ).rad(abc) 1+ɛ = < ( ) = < (25) We obtain that (11) is verified.
5 A Proposed Proof of The ABC Conjecture Case 3 We take ɛ = 1, then c < K(ɛ).rad(abc) 1+ɛ = < 2.( ) 2 = < (26) Ouf! 4 Conclusion This is an elementary proof of the ABC conjecture, confirmed by four numerical examples. We can announce the important theorem: Theorem 1 (David Masser, Joseph Œsterlé & Abdelmajid Ben Hadj Salem; 2018) Let a, b, c positive integers relatively prime with c = a + b, then for each ɛ > 0, there exists K(ɛ) such that : where K(ɛ) is a constant depending of ɛ equal to 2 ɛ 2. c < K(ɛ).rad(abc) 1+ɛ (27) References 1. Waldschmidt M.: On the abc Conjecture and some of its consequences presented at The 6th World Conference on 21st Century Mathematics, Abdus Salam School of Mathematical Sciences (ASSMS), Lahore (Pakistan), March 6-9, (2013) 2. Kremmerz K.: Titans of Mathematics Clash Over Epic Proof of ABC Conjecture. The Quanta Newsletter, 20 September (2018) 3. Nitaj A.: See page 359. The Princeton companion to mathematics, Gowers T (Editor). Princeton, ISBN , 1027 pages. (2008)
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