### Abstract

The main theorem states that if f(x_{1}, x_{2}, x_{3}) is an indefinite anisotropic integral quadratic form with determinant d(f), and t a non-zero integer such that d(f)t is square-free, then as long as there is one integer solution to f(x_{1}, x_{2}, x_{3}) = t there are infinitely many such solutions for which the product x_{1}x_{2}x_{3} has at most 26 prime factors. The proof relies on the affine linear sieve and in particular automorphic spectral methods to obtain a sharp level of distribution in the associated counting problem. The 26 comes from applying the sharpest known bounds towards Selberg's eigenvalue conjecture. Assuming the latter the number 26 may be reduced to 22.

Original language | English (US) |
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Pages (from-to) | 393-426 |

Number of pages | 34 |

Journal | Israel Journal of Mathematics |

Volume | 178 |

Issue number | 1 |

DOIs | |

State | Published - Dec 1 2010 |

### All Science Journal Classification (ASJC) codes

- Mathematics(all)