# Two exponential diophantine equations

Dominik J. Leitner^{[1]}

- [1] Mathematisches Institut Universität Basel Rheinsprung 21 4051 Basel, Switzerland

Journal de Théorie des Nombres de Bordeaux (2011)

- Volume: 23, Issue: 2, page 479-487
- ISSN: 1246-7405

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topLeitner, Dominik J.. "Two exponential diophantine equations." Journal de Théorie des Nombres de Bordeaux 23.2 (2011): 479-487. <http://eudml.org/doc/219785>.

@article{Leitner2011,

abstract = {The equation $3^a+5^b-7^c=1$, to be solved in non-negative rational integers $a,b,c$, has been mentioned by Masser as an example for which there is still no algorithm to solve completely. Despite this, we find here all the solutions. The equation $y^2=3^a+2^b+1$, to be solved in non-negative rational integers $a,b$ and a rational integer $y$, has been mentioned by Corvaja and Zannier as an example for which the number of solutions is not yet known even to be finite. But we find here all the solutions too; there are in fact only six.},

affiliation = {Mathematisches Institut Universität Basel Rheinsprung 21 4051 Basel, Switzerland},

author = {Leitner, Dominik J.},

journal = {Journal de Théorie des Nombres de Bordeaux},

keywords = {exponential Diophantine equations},

language = {eng},

month = {6},

number = {2},

pages = {479-487},

publisher = {Société Arithmétique de Bordeaux},

title = {Two exponential diophantine equations},

url = {http://eudml.org/doc/219785},

volume = {23},

year = {2011},

}

TY - JOUR

AU - Leitner, Dominik J.

TI - Two exponential diophantine equations

JO - Journal de Théorie des Nombres de Bordeaux

DA - 2011/6//

PB - Société Arithmétique de Bordeaux

VL - 23

IS - 2

SP - 479

EP - 487

AB - The equation $3^a+5^b-7^c=1$, to be solved in non-negative rational integers $a,b,c$, has been mentioned by Masser as an example for which there is still no algorithm to solve completely. Despite this, we find here all the solutions. The equation $y^2=3^a+2^b+1$, to be solved in non-negative rational integers $a,b$ and a rational integer $y$, has been mentioned by Corvaja and Zannier as an example for which the number of solutions is not yet known even to be finite. But we find here all the solutions too; there are in fact only six.

LA - eng

KW - exponential Diophantine equations

UR - http://eudml.org/doc/219785

ER -

## References

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