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1.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 19 ON THE TERNARY QUADRATIC DIOPHANTINE EQUATION Assistant Professor of mathematics, Department S&H, SSIET, Nuzvid, Andhra Pradesh, India ------------------------------------------------------------------***----------------------------------------------------------------- Abstract: The Non-Homogeneous Ternary Quadratic Diophantine Equation given by 4 represents a cone and is analyzed for its non-zero distinct integer solutions. A few interesting relations among the solutions and special polygonal and pyramided numbers are presented. On introducing the linear transformation x=u+v, y=u-v and employing the method of factorization, different patterns of non-zero distinct integer solutions to the above equation are obtained. Keywords: Non-Homogeneous Quadratic, Ternary Quadratic, Integer solutions, polygonal number and pyramidal number. 1. INTRODUCTION The Ternary Quadratic Diophantine equations offer an unlimited field for research by reason of their variety [1, 2]. In particular, one may refer [3, 19] for finding integer points on the some specific three dimensional surface. This communication concerns with yet another ternary quadratic Diophantine equation 4 representing cone for determining its infinitely many integer solutions. 1.1 Notations Used: 1. Polygonal number of rank ‘n’ with sides’ m ( ( )( ) ) 2. Stella Octangular number of rank ‘n’ ( ) 3. Pyramidal number of rank ‘n’ sides’ m ( ) [( ) ( )] 4. Pronic number of rank ‘n’ ( ) 2. METHOD OF ANALYSIS The Ternary Quadratic Diophantine equation to be solved for its non-zero distinct integral solutions is given by 4 (1) Using the linear transformation ( ) (2) Equation (1) becomes ( ) (3) Different patterns of solution of (1) are presented below PATTERN-I: Write ( √ )( √ ) (4) Assume that where a, b>0 are distinct integers. (5) Using (4) and (5) in (3) and applying the method of factorization, define (( ) √ ) ( √ )( √ ) (6) Equating the real and imaginary parts, we get ( ) ( ) Substituting the above values of u and v in (2), the values of x and y are given by ( ) ( ) (7) Thus equations (5) and (7) represent non-zero distinct integral solution of equation (1) in two parameters.
2.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 20 PROPERTIES: (1) ( ) is a perfect square. (2) ( ) ( ) (3) ( ) ( ) (4) ( ) ( ) (5) ( ) ( ) PATTERN-II: Instead of equation (4), we write ( √ )( √ ) (8) Write ( √ )( √ ) (9) Assume that where a, b>0 are distinct integers. (10) Equation (3) can be written as ( ) (11) Using the equations (8) & (9) in (11) and applying the method of factorization, define (( ) √ ) ( √ ) ( √ )( √ ) (12) Equating the real and imaginary parts, we get ( ) ( ) ( ) ( ) Substituting the above u and v in (2), the values of x and y are given by ( ) ( ) ( ) (13) For finding the integer solutions, we choose the values of a, b such that u and v are integers. Replacing a by 2A and b by 2B, in the equations (10) and (13) we get ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) (14) Substituting the values of u and v in equation (2) the values of x and y are given by ( ) ( ) ( ) (15) Thus the equation (15) represents non-zero distinct integral solutions of equation (1) in two parameters A, B. PROPERTIES: (1) ( ) . (2) ( ) ( ) (3) ( ) ( ) (4) ( ) ( ) ( ) (5) y( ) ( ) (6) ( ) PATTERN-III: Equation (3) can be written as ( ) (16) Using the linear transformation and (17) From (16) and (17), we get ( ) (18) Equation (18) is satisfied by ( ) ( ) ( ) (19)
3.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 21 Substituting the above values from (19) in (17) and using (2), the required integer solutions of (1) are given by ( ) ( ) ( ) (20) Therefore the equation (20) represents non-zero distinct integral solutions of the equation (1) in two parameters. PROPERTIES: (1) ( ) ( ) ( ) (2) ( ) ( ) ( ) (3) ( ) (4) ( ) ( ) (5) ( ) ( ) NOTE: In addition to (17) we may use the linear transformation and to get the different set of solutions as seen above. PATTERN-IV Consider (3) as ( ) ( ) (21) ( ) This is equivalent to the following two equations ( ) ( ) and ( ) ( ) . On employing the method of cross multiplication, we get ( ) ( ) (22) ( ) (23) Substituting the values of u and v from (22) in (2), the non- zero distinct integral values of x, y are given by (24) Thus the equation (24) represents non-zero distinct integral solutions of (1) in two parameters. PROPERTIES: (1) ( ) (2) ( ) ( ) (3) ( ) ( ) (4) ( ) (5) ( ) ( ) ( ) NOTE: Equation (21) can also be expressed, in the form of ratio in three different ways that are given below. PATTERN-V ( ) ( ) This is equivalent to the following two equations ( ) ( ) and ( ) ( ) On employing the method of cross multiplication, we get ( ) ( ) (25) ( ) (26) Substituting the values of u and v from (25) in (2), the non- zero distinct integral values of x, y are given by (27) Thus the equation (24) represents non-zero distinct integral solutions of (1) in two parameters.
4.
International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 22 PATTERN-VI ( ) ( ) This is equivalent to the following two equations ( ) ( ) and ( ) ( ) On employing the method of cross multiplication, we get ( ) ( ) (28) ( ) (29) Substituting the values of u and v from (28) and (29) in (2), the non-zero distinct integral values of x, y are given by (30) Thus the equation (30) represents non-zero distinct integral solutions of (1) in two parameters. PATTERN-VII ( ) ( ) This is equivalent to the following two equations ( ) ( ) and ( ) ( ) On employing the method of cross multiplication, we get ( ) ( ) (31) ( ) (32) Substituting the values of u and v from (31) and (32) in (2), the non-zero distinct integral values of x, y are given by (33) Thus the equation (33) represents non-zero distinct integral solutions of (1) in two parameters. 3. CONCLUSION: In this paper I have presented seven different patterns of non-zero distinct integer solutions of the non- homogeneous cone given by . To conclude, one may search for patterns of non- zero distinct integer solutions and their corresponding properties for other choices of ternary quadratic Diophantine equations. REFERENCES [1] Dickson L.E. History of theory of numbers, Vol 2, Chelsea Publishing Company, New York , 1952. [2] Mordell U. Diophantine equations, Academic Press, New York, 1969. [3] Gopalan MA, Manju Somanath and V Sangeetha, on the ternary quadratic equation ( ) IJIRSET Vol 2. Issue 6.2008-2010, 2013. [4] Gopalan MA,S Vidhya Lakshmi and N Nivethitha, on the ternary quadratic equation 4( ) Diophantus J. Math., 3(1),1-7, 2014. [5] Shanthi J, Gopalan MA and S Vidhya Lakshmi . Lattice points on the homogeneous cone 8( ) Sch. J. Phys. Math. Stat. Vol 1(1), june-aug, 29-32, 2014 [6] K.Meena, Gopalan MA, S Vidhya Lakshmi and I Krishna Priya, integral points on the cone 3( ) Bulletin of Mathematics and Statistics Research. Vol 2(1), 65-70, 2014. [7] Gopalan MA, Pandichelvi V. integer solutions of ternary quadratic equation ( ) .Acta Ciencia Indica, 2008, XXXVIM (3),1353-1358. [8] Gopalan MA, Kalinga Rani J. observations on the Diophantine equation .Impact J. Sci.Tech, 2008, 2, 2, 91-95. [9] Gopalan MA, Manju Somanath, Vanitha N. integer solutions of ternary quadratic Diophantine equation ( ) . Impact J. Sci.Tech, 2008, 2(4), 175-178.
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International Research Journal
of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 23 [10] Gopalan MA, Manju Somanath, Integer solutions of ternary quadratic Diophantine equation .Antarctica J. Math., 2008, 5, 1-5. [11] Gopalan MA, Pandichelvi V. integer solutions of ternary quadratic equation ( ) . Impact J. Sci.Tech, 2011, 5(1), 1-6. [12] Gopalan MA, Kalinga Rani J. on the ternary quadratic equation .Impact J. Sci.Tech, 2011, 5(1), 39-43. [13] Gopalan MA, Geetha D. Lattice points on the hyperboloid of two sheets .Impact J. Sci.Tech, 2011, 4(1), 23-32. [14] Gopalan MA, VidhyaLakshmi S, Kavitha A. Integer points on the homogeneous cone Diophantus J.Math., 2012, 1(5), 127-136. [15] Gopalan MA, VidhyaLakshmi S, Sumathi G. Lattice points on the hyperboloid of two sheets Diophantus J.Math., 2012, 1(2), 109-115. [16] Gopalan MA, Vidhya Lakshmi S, Lakshmi K. Lattice points on the hyperboloid of two sheets Diophantus J. Math., 2012, 1(2),99- 107. [17] Gopalan MA, Vidhya Lakshmi S, UshaRani TR, Mallika S. observation on . Impact J. Sci.Tech, 2012, 6(1), 7-13. [18] Gopalan MA, Vidhya Lakshmi S, UshaRani TR. Integer points on the non-homogeneous cone Global J. Sci. Tech, 2012, 2(1), 61-67. [19] Gopalan MA, Vidhya Lakshmi S, Uma Rani J. Integer points on the homogeneous cone Cayley J. Math., 2013, 2(2), 101-107. AUTO-BIOGRAPHY Chikkavarapu Gnanendra Rao, (born on 31-1-1983 in Nuzvid, Andhra Pradesh) completed post-graduation in mathematics from P.B.Siddartha College of arts and science in Vijayawada in the year 2005. Presently he is working as assistant professor of mathematics in Sri Sarathi Institute of Engineering and Technology. He was qualified in GATE 2013 and APSET-2012.
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