Permalink Submitted by Anonymous on September 14, 2012

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.

## A question

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.