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| From: | Ralf Hemmecke |
| Subject: | Re: [Axiom-math] if-expression and variables |
| Date: | Fri, 10 Jun 2011 20:54:38 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 |
On 06/10/2011 07:56 PM, Stefan Karrmann wrote:
Dear all, we can help ourselves in some cases by: sign x == (abs x)/x H x == (1 + sign x)/2 step (a,b,x) == (H(x-a)) * (H(b-x)) The drawback is that we get a 'Division by zero'.
Show a short program that demonstrates this error message. Only then is somebody able to help.
Ralf PS: "sign" is already built-in. Try out )display op sign .
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