Opened 10 years ago

Closed 8 years ago

# bug in primdecEHV?

Reported by: Owned by: kroeker@… pfister minor 4-1-0 and higher singular-libs 4-0-0 primdecEHV

### Description

The output of primdecEHV and primdecGTZ differs sometimes. here are some of the related examples:

```LIB("ehv.lib");

ring rng = 0,(x),dp;
ideal j = -3*x^2+4*x;

list L1 = primdecGTZ(j);
L1;
list L2 = primdecEHV(j);
L2;

ideal j = 6*x^2+3*x;

list L1 = primdecGTZ(j);
L1;
list L2 = primdecEHV(j);
L2;

```

the corresponding output is:

```. ring rng = 0,(x),dp;
> ideal j = -3*x^2+4*x;
>
. list L1 = primdecGTZ(j);
> L1;
[1]:
[1]:
_[1]=x
[2]:
_[1]=x
[2]:
[1]:
_[1]=3x-4
[2]:
_[1]=3x-4
> list L2 = primdecEHV(j);
> L2;
[1]:
[1]:
_[1]=3x2-4x
[2]:
_[1]=3x2-4x
>
.
. j = 6*x^2+3*x;
>
. list L1 = primdecGTZ(j);
> L1;
[1]:
[1]:
_[1]=x
[2]:
_[1]=x
[2]:
[1]:
_[1]=2x+1
[2]:
_[1]=2x+1
> list L2 = primdecEHV(j);
> L2;
[1]:
[1]:
_[1]=2x2+x
[2]:
_[1]=2x2+x

```

### comment:1 Changed 10 years ago by mlee

Owner: changed from somebody to pfister

### comment:2 Changed 8 years ago by hannes

Resolution: → invalid new → closed

primdecEHV is obsolete: no bug fixes for that.

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