[Maxima-bugs] [maxima:bugs] #3364 sqrt(5) => sqrt(2)*%i with modulus=7

[Stavros M. <mac...@us...>]

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** [bugs:#3364] sqrt(5) => sqrt(2)*%i with modulus=7**

**Status:** open
**Group:** None
**Created:** Tue Nov 28, 2017 10:20 PM UTC by Stavros Macrakis
**Last Updated:** Tue Nov 28, 2017 10:20 PM UTC
**Owner:** nobody


    sqrt(5) => sqrt(2)*%i with modulus=7
    9^(1/3) => 2^(1/3) with modulus=7
    
This is not correct. The 5 should only be converted to mod(5,7) = -2 within a CRE, e.g.,

    rat(sqrt(5)) => sqrt(2)*%i
    
Note this inconsistency:

    modulus:false$
    ex: [5, sqrt(5)] => [5, sqrt(5)]
    modulus:7$
    rat(ex) => [5,sqrt(5)]
    BUT
    rat([5,sqrt(5)]) => [-2,sqrt(2)*%i]
    
build_info(version="5.41.0a_dirty",timestamp="2017-10-23 00:00:36",host="i686-w64-mingw32",lisp_name="CLISP",lisp_version="2.49 (2010-07-07) (built on toshiba [10.0.3.1])")


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