Add new comment

Permalink

It's possibly quiet irrelevant for this subject, but you mentioned it there. Why the honeycomb lattice is doubly periodic, not triply periodic? What is about vector rotated for -30 degrees? Thanks in advance.

Filtered HTML

  • Web page addresses and email addresses turn into links automatically.
  • Allowed HTML tags: <a href hreflang> <em> <strong> <cite> <code> <ul type> <ol start type> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.