Opened 6 years ago

Closed 6 years ago

## #784 closed bug (fixed)

# Absolute factorization over QQ(t)

Reported by: | anonymous | Owned by: | somebody |
---|---|---|---|

Priority: | minor | Milestone: | 4-1-0 and higher |

Component: | dontKnow | Version: | 4-0-3 |

Keywords: | Cc: |

### Description

Absolute factorization fails to factor x2 - t over QQ(t).

SINGULAR / Development A Computer Algebra System for Polynomial Computations / version 4.1.0 0< by: W. Decker, G.-M. Greuel, G. Pfister, H. Schoenemann \ Nov 2016 FB Mathematik der Universitaet, D-67653 Kaiserslautern \ // ** executing /scratch/hannes/snork/Singular/LIB/.singularrc > LIB "absfact.lib"; // ** loaded /scratch/hannes/snork/Singular/LIB/absfact.lib (4.0.0.0,Jun_2013) > ring R = (0, t), (x), dp; > poly f = x^2 - t; > def S = absFactorize(f); // 'absFactorize' created a ring, in which a list absolute_factors (the // absolute factors) is stored. // To access the list of absolute factors, type (if the name S was assigned // to the return value): // setring(S); absolute_factors; > setring(S); > absolute_factors; [1]: _[1]=1 _[2]=x2+(-t) [2]: 1,1 [3]: _[1]=(a) _[2]=(a) [4]: 1

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will produce an error: only implemented for rational coefficients