division of poly (by 1, -1, or content) failure

[seelisch]

Hallo Hans,

in Singular 3-1-0

Singular for ix86-Linux version 3-1-0 (3100-2009011515) Jan 15 2009 15:20:58

sind noch weitere BUGS:

z.Bsp:

Division von Polynomen durch die Einheiten 1 und -1 im Ring mit Koeffizientenbereich integer fuehrt zum Crash

ring Zx = integer,x,dp;

You are using coefficients rings which are not fields. Please note that only limited functionality is available for these coefficients. The following commands are meant to work: - basic polynomial arithmetic - std - reduce

poly f = x; f/1; Crash

* glibc detected * double free or corruption (fasttop): 0x0865a610 * Singular : signal 6 (v: 3100/2009011515): Segment fault/Bus error occurred at 853de91 because of 0 (r:1232050448) please inform the authors trying to restart... .

Desweiteren sollte Division durch den content erlaubt sein.

ring Zx = integer,x,dp;

poly f = x; f/2; OK nach Definition

0

poly g = 2x2+2; sollte x2+1 ergeben g/2;

* glibc detected * double free or corruption (fasttop): 0x0865a5d0 * Singular : signal 6 (v: 3100/2009011515): Segment fault/Bus error occurred at 853de91 because of 0 (r:1232050996) please inform the authors trying to restart...

und weiter:

ring Zx = integer,x,dp;

number m = 4; m/2;

2

m/number(2);

2

m/number(3);

Division by non divisible element. Result is without remainder. 1 OK

m/number(5);

Division by non divisible element. Result is without remainder. * glibc detected * double free or corruption (fasttop): 0x0865a5c8 * Singular : signal 6 (v: 3100/2009011515): Segment fault/Bus error occurred at 853de91 because of 0 (r:1232051067) please inform the authors trying to restart... .

------

Gruss

Christian

[hannes]

Fehler in nrzDiv, nrzInvers gefixt.