[seqfan] Re: Feynman diagrams of order 2n

[Charles Greathouse]

I've added names for A005411-A005414. If someone could check these --
especially A005413 and A005414 -- I'd be much obliged.

Charles Greathouse
Analyst/Programmer
Case Western Reserve University


On Fri, Jan 24, 2014 at 12:58 AM, Andrew Weimholt <andrew.weimholt at gmail.com
> wrote:

> The answer is provided in the paper referenced by the sequence
> http://www.nbi.dk/~predrag/papers/PRD18-78.pdf.
> In Table I on page 18 is the apparent source of the sequences.
> The sequences A000698, A005411, A005412, A005413, A005414 appear as columns
> in the table.
> 5411 through 5415 are all called "Feynman diagrams of order 2n". They
> should be clarified as
> "Feynman diagrams of order 2n with exact propagators" for A005411, "Feynman
> diagrams of order 2n with proper self-energies" for A005412, etc.
> A comment in A000698 says "Also number of nonisomorphic unlabeled connected
> Feynman diagrams of order n.", but the table in the paper suggest that this
> should perhaps be "2n".
>
> Andrew
>
>
> On Thu, Jan 23, 2014 at 9:00 PM, Charles Greathouse <
> charles.greathouse at case.edu> wrote:
>
> > What is the difference between A005412 and A005413? They both have the
> same
> > name but different values.
> >
> > Charles Greathouse
> > Analyst/Programmer
> > Case Western Reserve University
> >
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