Re: [sage-support] Re: Sage Crash Report

[John H Palmieri]

On Tuesday, August 15, 2017 at 9:49:35 PM UTC-7, William wrote:
>
> On Tue, Aug 15, 2017 at 7:47 PM John H Palmieri  > wrote:
>
>> One of the very last lines of the report says
>>
>>>
>>> ImportError: libgfortran.so.3: cannot open shared object file: No such file 
>>> or directory
>>>
>>>
>> You need to install gfortran on your computer.
>>
>
> We should really build binaries that don't require fortran to be 
> installed, or put in an error before Python even starts importing.
>

Yes, I agree.
 

>
> I personally hit or saw the above crash report dozens of times recently, 
> due to installing Sage binaries in various fairly minimal Docker containers.
>
> william
>
> -- 
> -- William Stein
>

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[sage-support] Re: [forwarded from bug tracker]

[John Cremona]

Apologies, that was supposed to go to lmfdb-support.  Ignore!

John

On 16 August 2017 at 08:48, John Cremona  wrote:
> This is a very minor comment about the description/definition of "GL_2
> type" in the genus 2 curve page (after clicking the "GL_2 type" link).
> The last sentence is a bit misleading. Perhaps it should say "the
> endomorphism algebra is 2-dimensional over Q" as opposed to "the
> endomorphism algebra is isomorphic to Q \oplus Q". The notation in the
> latter makes it seem like the endomorphism algebra is isomorphic *as
> an algebra* to Q \oplus Q, which it need not be. The first sentence of
> the paragraph points this out, but the (current) last sentence makes
> it sound like the split quadratic algebra is the only one that can
> occur among GL_2-type, genus 2 Jacobians. (And this is not the case.)
>
> Best,
> Ari Shnidman
> shnid...@bc.edu
>
> --
>
> I'll make an Issue for this.

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[sage-support] [forwarded from bug tracker]

[John Cremona]

This is a very minor comment about the description/definition of "GL_2
type" in the genus 2 curve page (after clicking the "GL_2 type" link).
The last sentence is a bit misleading. Perhaps it should say "the
endomorphism algebra is 2-dimensional over Q" as opposed to "the
endomorphism algebra is isomorphic to Q \oplus Q". The notation in the
latter makes it seem like the endomorphism algebra is isomorphic *as
an algebra* to Q \oplus Q, which it need not be. The first sentence of
the paragraph points this out, but the (current) last sentence makes
it sound like the split quadratic algebra is the only one that can
occur among GL_2-type, genus 2 Jacobians. (And this is not the case.)

Best,
Ari Shnidman
shnid...@bc.edu

--

I'll make an Issue for this.

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