Remarks on $n$-dimensional Feynman diagrams, for example, which will   appear in M-theory and in F-theory
  We state some remarks on `$n$-dimensional Feynman diagrams' ($n\in\N$). There are different features between in the case of $n$-dimensional Feynman diagrams($n\geqq3$) and in the 1-, 2-dimensional case. 
Eiji Ogasa