I have a problem understanding a definition at page 93 of 'from perturbative to constructive renormalization', that is related to Graph Theory, and he uses it on the proof of the uniform BPH theorem for [itex]\phi_4^4[/itex] ([itex]\lambda \phi^4[/itex] in [itex]D=4[/itex]).(adsbygoogle = window.adsbygoogle || []).push({});

You have a graphG, a forest of quadrupedsF, andga subgraph ofGcompatible with the tree structure ofF. [itex]B_F(g)[/itex] is defined as theancestor of. What meansginFUGancestorin this context?

Maybe this question doesn't belong here, I'm sorry if that's the case. I thought that it belonged here because it's related to renormalization.

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

Join Physics Forums Today!

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

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

# I Question about a definition in Rivasseau's book

Tags:

Have something to add?

Draft saved
Draft deleted

Loading...

Similar Threads for Question definition Rivasseau's | Date |
---|---|

A Question about data & Monte Carlo statistical uncertainties | Apr 9, 2018 |

I X-ray dose question | Mar 14, 2018 |

I X-ray tube to gamma tube question | Mar 13, 2018 |

A Question about a cross section from PDG | Mar 8, 2018 |

I Are neutrinos definitely ruled out as Dark Matter? | Mar 8, 2017 |

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