**József Sándor and Edith Egri**

Notes on Number Theory and Discrete Mathematics

Print ISSN 1310–5132, Online ISSN 2367–8275

Volume 22, 2016, Number 3, Pages 90—91

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## Details

### Authors and affiliations

József Sándor

*Babeș–Bolyai University
Cluj–Napoca, Romania*

Edith Egri

*Babeș–Bolyai University
Cluj–Napoca, Romania*

### Abstract

We offer a new proof of the classical fact that √*N* is irrational, when *N* is not a perfect square.

### Keywords

- Perfect square
- Irrationality of square roots

### AMS Classification

- 11A05
- 11J72

### References

- Ross, M. (2004) Irrational thoughts, Math. Gazette, March, 2004, pp. 68–78.
- Aigner, M., & Ziegler, M. G. (2014) Proofs from the Book, Fifth ed., Springer-Verlag Berlin Heidelberg.

## Related papers

## Cite this paper

APASándor, J. & Egri, E. (2016). On the irrationality of √*N*, Notes on Number Theory and Discrete Mathematics, 22(3), 90-91.

Sándor, József and Edith Egri “On the Irrationality of √*N*.” Notes on Number Theory and Discrete Mathematics 22, no. 3 (2016): 90-91.

Sándor, József and Edith Egri, “On the Irrationality of √*N*.” Notes on Number Theory and Discrete Mathematics 22.3 (2016): 90-91. Print.