Re: [Maxima-discuss] Problem with bfloat

[Raymond T. <toy...@gm...>]

I didn't have any bfloat issues when trying to solve this with cmucl and a
very recent git version of maxima. I don't see why solve should use bfloats
since it's supposed to be doing a symbolic solution.

However, if you just want the numerical roots, you can try allroots or
bfallroots.



On Sat, Aug 30, 2014 at 6:47 AM, couraud <l.c...@gm...> wrote:

>  Hi everyone,
>
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>
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> It seems there is a problem when I try to solve this:
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> eq :
> (40009998701367538133225879326610021275787734886557239554786867344479948809558936357308346039090053912747976315161807499191750731565057412193427526125139943062483732353369059902143126883533765447106960495457745029916237144786993152
>
>  *r6^4
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>
>  -635169949538565681576982326160549436240883584439338432673525994990913080807950260860564946300674411801050636541037207842492256551427372153039955618506945366919221198007650439524793012000679388450770855239677149593727590431005134028800
>
>   *r6^3
>
>
>  +3773582944487787455830551492803259388211349008151340804131552138188093815385623045926247772506066538790464420557034914421623994643207226503772289573557474677051463750616572107720270280803074163957471223808122510464828502175400748646400000
>
>   *r6^2
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>
>  -9948279623627893869859289209594080416041808413076560304612414814587118716991627738173731600116720301970551077968613578942034278006729503574412645544866229928697333169298505177614238627894769858092583862465518854305173865700801694924800000000
>
>   *r6
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>
>  +9822922763110022709311739852374932544701082989677604695371182275825523040365218991617759102209164976234430910614344753842949200199390345412495844846726154719177727206292919047920074582348967155833787042629327031586343766578291539968000000000000)
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>  /582076609134674072265625$
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>
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> trace(bfloat)$
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> solve(eq, r6);
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> 1 Enter bfloat [0.0 + 1..#INF00e+000E+2678440]
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>  2 Enter bfloat [0.0]
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>  2 Exit  bfloat 0.0b0
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>  2 Enter bfloat [1..#INF00e+000E+69]
>
> bfloat: attempted conversion of floating-point infinity.
>
>  -- an error. To debug this try: debugmode(true);
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