Group Theory (AQA A-Level Further Maths): Flashcards

📚Flashcards
Isomorphisms
Sign up to keep revising.Create a free account to study more flashcards and track your progress.

Practise the cards

10 cards from this deck

Show

Isomorphic groups

Groups with same structure via one-to-one mapping

Notation for isomorphic groups HH and GG

HGH \cong G

Isomorphism condition formula

f(pq)=f(p)f(q)f(p \bullet q) = f(p) \star f(q)

Self-inverse element

Element aa where aa=ea \bullet a = e (identity)

Identity elements in isomorphic groups

Must correspond to each other

Differences needed to disprove isomorphism

Only ONE structural difference

Disprove isomorphism: self-inverse elements

Different numbers of self-inverse elements

Period/order of element aa

Smallest nn where an=ea^n = e

Disprove isomorphism: periods

Different periods of elements in each group

Cyclic group

Group generated by a single element

Join 100,000+ A-Level students studying Flashcards with us.

Select your subjects, and get access to A+ resources today.