| It was set up in the frame of effective polyad models by using algorithms based on advanced group theory algebra to take full account of symmetry properties. |
| A polyad is a lax functor from a small category to the bicategory of categories, and a Hopf polyad is a comonoidal polyad whose fusion operators are invertible. |
| It is found that the overall statistical properties and polyad structure of 15NO2 are comparable to those of 14NO2 but that the internal structures of the polyads are completely different. |
