I was just trying to think of a simple relation to find the number of distinct diagrams to a given order within a theory (specifically I am thinking of a [tex]\phi^{4}[/tex] scalar theory). I am reading Tony Zee's book and am working through his "baby problem" where he expands the integral:(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\int_{-\inf}^{\inf} dq e^{-\frac{1}{2}m^{2}q^{2}+Jq-\frac{\lambda}{4!}q^{4}[/tex]

in both in powers of [tex]\lambda[/tex] and J so that we can pick out diagrams to a specific order in both.

So is there a way to find the total number of distinct diagrams to order [tex](\lambda^{n},J^{m})[/tex]?

Thanks in Advanced

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Number of distinct diagrams.

Loading...

Similar Threads - Number distinct diagrams | Date |
---|---|

I Complex numbers of QM | Feb 14, 2018 |

I Is this a Stirling number of the second kind? | Dec 27, 2017 |

A How high of atomic number to get g-block electrons? | Dec 22, 2017 |

I Multiplying a wavefunction by a constant number | Nov 4, 2017 |

I Scattering, 4 point correlator, number of distinct Feynman diagrams | Jan 2, 2017 |

**Physics Forums - The Fusion of Science and Community**