[GAP Forum] LogFFE bug

Iverson, Joseph W [MATH] jwi at iastate.edu
Mon Dec 16 18:26:54 GMT 2019


Dear GAP forum,

There appears to be a bug with LogFFE:

┌───────┐   GAP 4.10.1 of 23-Feb-2019
 │  GAP  │   https://www.gap-system.org
 └───────┘   Architecture: x86_64-apple-darwin18.5.0-default64-kv3
 Configuration:  gmp 6.1.2
 Loading the library and packages ...
 Packages:   AClib 1.3.1, Alnuth 3.1.0, AtlasRep 1.5.1, AutoDoc 2019.02.22, AutPGrp 1.10, Browse 1.8.8, Carat 2.2.3, CRISP 1.4.4, Cryst 4.1.18, CrystCat 1.1.8, CTblLib 1.2.2, 
             FactInt 1.6.2, FGA 1.4.0, GAPDoc 1.6.2, IO 4.5.4, IRREDSOL 1.4, LAGUNA 3.9.2, Polenta 1.3.8, Polycyclic 2.14, PrimGrp 3.3.2, RadiRoot 2.8, ResClasses 4.7.1, 
             SmallGrp 1.3, Sophus 1.24, SpinSym 1.5, TomLib 1.2.7, TransGrp 2.0.4, utils 0.61
 Try '??help' for help. See also '?copyright', '?cite' and '?authors'
gap> z:=Z(359^2); 
z
gap> LogFFE(z^4,z^2);
fail

According to the documentation, LogFFE(alpha,beta) should only return "fail" if alpha is not a power of beta. Is 359^2 just too big to ask questions like this?

Best regards,
Joey Iverson

Assistant Professor
Department of Mathematics
Iowa State University





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