Dear Zbigniew, Thank you for sharing your work but this forum is meant for kwant advantages in solving physical problems. Did you try this with kwant ? The answer to your question seems straightforward with kwant: lat.neightbors(n) gives you the nth nearest neighbour. You can extract the number of sites on a ring easily.
Regards, Adel On Sun, May 3, 2020 at 4:36 PM Zbigniew Koziol <softqu...@gmail.com> wrote: > What is the number of neighbors on graphene lattice? > > That question bothered me for 2-3 years. Finally, I found a way to solve > the problem. > > Did I find a something was already known? I guess not. > > The issue may probably interest many of you on this list. > > Please let me know what you think about my "solution"? I am myself very > curious. > > I am, BTW, interested in contacts (talking, solving problems, doing the > work together, publishing together) with people who are on subjects close > to graphene. Do not hesitate to contact me. > > *Number of equidistant neighbors on honeycomb lattice*: > > https://arxiv.org/abs/2004.11840 > > zb. > > -- > Zbigniew Kozioł, PhD, > National Center for Nuclear Research, > Materials Research Laboratory, > ul. Andrzeja Sołtana 7, > 05-400 Otwock-Świerk, Polandhttp://nanophysics.pl > mobile: +48 507 330 216 > > > -- Abbout Adel
