|Dirk Laurie on Thu, 08 Aug 2013 20:10:09 +0200|
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|Re: Variable checker|
2013/8/7 Karim Belabas <Karim.Belabas@math.u-bordeaux1.fr>: > My approach for this, would be to write a function > > variables(expr) ... > for (i = 1, #v, L = setunion(L, variables(v[i]))); 'setunion' is available in 2.5.1 too, but I can't get it to obey me. $ gp Reading GPRC: /etc/gprc ...Done. GP/PARI CALCULATOR Version 2.5.1 (released) i686 running linux (ix86/GMP-5.0.2 kernel) 32-bit version compiled: Aug 4 2013, gcc-4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4) (readline v6.2 enabled, extended help enabled) Copyright (C) 2000-2011 The PARI Group PARI/GP is free software, covered by the GNU General Public License, and comes WITHOUT ANY WARRANTY WHATSOEVER. Type ? for help, \q to quit. Type ?12 for how to get moral (and possibly technical) support. parisize = 4000000, primelimit = 500509 ? setunion([x],[a]) *** at top-level: setunion([x],[a]) *** ^----------------- *** setunion: incorrect type in comparison. *** Break loop: type 'break' to go back to GP break> When I assign [x] and [a] to variables, then \x makes them look exactly the same.