Duality (order theory)
Автор:
Jesse Russell,Ronald Cohn, издатель:
"VSD", ISBN:
978-5-5117-0543-9
High Quality Content by WIKIPEDIA articles! In the mathematical area of order theory, every partially ordered set P gives rise to a dual (or opposite) partially ordered set which is often denoted by Pop or Pd. This dual order Pop is defined to be the set w