Evaluating very simple inequalities

[Cyril Bdl]

Hello,

Is this normal ?

var('t')
assume(t<1,t>-1)
assume(t,'real')
bool(abs(t)<1)

False

This led my students (and I !!) to many difficulties before we understood that all was coming from this strange behaviour.

Thank you for your help !

[William Stein]

This is a general Sage question, so I'm sending it to the sage-support
mailing list, which I encourage you to join:

https://groups.google.com/forum/#!forum/sage-support

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--
William Stein
Professor of Mathematics
University of Washington
http://wstein.org

[Cyril Bdl]

Thank you.