[seqfan] Re: does 148 belong to A094612 ?

Max Alekseyev maxale at gmail.com
Wed Apr 28 23:45:49 CEST 2010


Wouter,

I would buy this explanation if A094612 did not contain 316, which is
also "a different species".

Regards,
Max

On Wed, Apr 28, 2010 at 5:27 PM, wouter meeussen
<wouter.meeussen at pandora.be> wrote:
> Max,
>
> Eric's formula doesn't work in Mma 4.0,
>
> this is strange. Mma 4.0 says:
> "ClassList[d] gives a set of representatives of the equivalence classes
> under composition of binary quadratic forms a*x^2+b*x*y+c*y^2 of
> discriminant d. It is assumed that d is a negative square­free integer of
> the form d=4k+1.
>
> I understand that, at least, d should be negative, -d should be of the form
> 4*k+1 (k>=0),
> and ***  ( -d)  should be squarefree   ***
>
>                                                        detail, details,
> always them details ...
> Surely 148 is of a different species,
>
> definitions might have changed over time,
> and with the Higgs coming 'round the bend,
> who knows what'll happen when maths finally turn fashion-aware,
>
> Wouter.
>
>
> ----- Original Message -----
> From: "Max Alekseyev" <maxale at gmail.com>
> To: "SeqFan" <seqfan at list.seqfan.eu>
> Sent: Wednesday, April 28, 2010 10:22 PM
> Subject: [seqfan] does 148 belong to A094612 ?
>
>
>> SeqFans,
>>
>> My PARI/GP claims that 148 must be an element of A094612:
>>
>> ? qfbclassno(148)
>> %1 = 3
>>
>> Could somebody please check Mathematica code given there and see why
>> 148 is missing.
>>
>> Thanks,
>> Max
>>
>>
>> _______________________________________________
>>
>> Seqfan Mailing list - http://list.seqfan.eu/
>>
>>
>> __________ NOD32 5066 (20100427) Informatie __________
>>
>> Dit bericht is gecontroleerd door het NOD32 Antivirus Systeem.
>> http://www.nod32.nl
>>
>>
>
>
>
> _______________________________________________
>
> Seqfan Mailing list - http://list.seqfan.eu/
>




More information about the SeqFan mailing list