gp: gcd(0), tan(Pi/2) error messages unhelpful

Michael Somos on Mon, 6 Jan 2003 16:57:36 -0500

[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

gp: gcd(0), tan(Pi/2) error messages unhelpful

To: pari-dev@list.cr.yp.to
Subject: gp: gcd(0), tan(Pi/2) error messages unhelpful
From: Michael Somos <somos@grail.cba.csuohio.edu>
Date: Mon, 6 Jan 2003 16:57:36 -0500

pari-dev,

? gcd(0)
  ***   incorrect type in association.
? \p29
   realprecision = 38 significant digits (29 digits displayed)
? tan(Pi/2)
  ***   division by zero in R/R

These error messages are unhelpful. In a program which calls these
in lower-level functions, it is not easy to figure out where these
error messages came from. While not bugs in 'gp' itself, they can
make finding bugs in user function difficult. Shalom, Michael

Follow-Ups:
- Re: gp: gcd(0), tan(Pi/2) error messages unhelpful
  - From: Karim BELABAS <Karim.Belabas@math.u-psud.fr>

Prev by Date: pi(x)
Next by Date: Re: gp: gcd(0), tan(Pi/2) error messages unhelpful
Previous by thread: pi(x)
Next by thread: Re: gp: gcd(0), tan(Pi/2) error messages unhelpful
Index(es):
- Date
- Thread