Graph Theory: B is a subgraph to A. C is isomorphic to B. Why isn't C also a subgraph to A?

Question

Here's the (norwegian) exam that says otherwise: https://wiki.math.ntnu.no/_media/ma0301/v12-lf.pdf

The very last solution (6b) shows a Hasse diagram of a partial-order relation with (ii) being a subgraph to (v).

On the very bottom of this exam paper the different graphs are supplied: https://wiki.math.ntnu.no/_media/ma0301/v12-nb.pdf

As you can see from the second link, (ii) and (iii) are isomorphic (also acknowledged in the solution), yet only (ii), not (iii) is a subgraph to (v) on the Hasse diagram in the first PDF link.

Answer 1

???????????????? 'subgraf" ?????????????

maebee thats a part av a graf, or a sekshun, pees??????????