## INFORMATION FOR AUTHORS

**Submission** of a manuscript implies that the work described has not been published before (except in the form of a preprint), that it is not under consideration for publication elsewhere, and that it will not be submitted elsewhere unless it has been rejected by the editors of Acta Arithmetica. Manuscripts in the form of PDF files should be submitted here.

**On acceptance of the paper**, the authors will also be asked to transmit the TeX source file, and then to sign the copyright transfer agreement on the proof stage.

For joint papers, Acta Arithmetica maintains correspondence with only one author. You may contact us through the editorial system or by email.

Recommended **format** of manuscripts: 12-point type (including references), text width 13.5 cm.

**Template files**

The amsart style: IMPAN-amsart.tex, IMPAN-amsart.pdf

The article style: IMPAN-article.tex, IMPAN-article.pdf

**Abstracts** are not printed, but will appear on the journal's web site. The AMS Mathematics Subject Classification and a list of key words and phrases are required.

**Figures** must be prepared in electronic form, suitable for direct reproduction. The use of very thin lines should be avoided.

**References** should be arranged in alphabetical order, and styled according to the examples given below. Abbreviations of journal names should follow Mathematical Reviews.

Examples:

[1] | R. C. Baker, Diophantine Inequalities, Clarendon Press, Oxford, 1986. |

[2] | R. J. Duffin and A. C. Schaeffer, Khintchine's problem in metric diophantine approximation, Duke Math. J. 8 (1941), 243--255. |

[3] | W. M. Schmidt, Diophantine Approximation, Lecture Notes in Math. 785, Springer, 1980. |

[Ka] | A. A. Karatsuba, Elements of Analytic Number Theory, Nauka, Moscow, 1975 (in Russian). |

[Le] | J. Lehner, Automorphic forms, in: Discrete Groups and Automorphic Functions, W. Harvey (ed.), Academic Press, 1977, 73--120. |

Complete **postal addresses** of all authors should be given.

PDF **proofs** will be e-mailed to the corresponding author.

The **Online First** version of the article will be sent to the author and published on the journal's web site before the article is assigned to an issue. This version will be freely downloadable for everybody. The author is allowed to post the “Online First” version to his/her personal web site and to any other archives.

When the paper is assigned to an issue, the **final print file** with all publication data included will also be sent to the author. The latter file will be for the author's personal use only and should not appear on any web site other than IMPAN’s.

**Offprints** of the article in batches of 25 can be purchased. They can be ordered when sending the proof corrections.

The article can also be published in **Open Access **(that is, with the final print file also freely downloadable) upon paying a fee of 300 euros. The decision should be communicated at the proof stage; the appropriate invoice will then be sent to the author.

**Address of the Editorial Committee**:

Acta Arithmetica

Uniwersytetu Poznańskiego 4

61-614 Poznań, Poland

Email

For additional information and advice, see Guidelines for authors.