maths.free › Abstract Algebra › Cosets and Lagrange's Theorem › Lagrange's Theorem

Lagrange's Theorem

Proposition Let H be a subgroup of G with g \in G and define a map \phi:H \rightarrow gH by \phi(h) = gh. The map \phi is bijective; hence, the number of elements in H is the same as the number of elements in gH.

Lagrange's Theorem

suggests that groups of prime order \(p\) must somehow look like \({\mathbb Z}_p\).

In fact, we can say more about when two cycles have the same length.

Condensed: the full section is in Judson, Abstract Algebra: Theory and Applications.

Nou jy Geen sakrekenaar los hierdie een nie, maar die stukke daarvan is kon nie wees kondifiseerbaar. Probeer een hieronder, of tik jou eie.

Hou jou eie werk

'n Vry rekening voeg notas by oor elke les, 'n verslag van wat jy klaar gemaak het, jou opgelos probleme op een plek, en' n tugmeester wat jy kan vra oor hierdie bladsy. Die wiskunde self is oop vir almal, geteken in of nie.

Meld op Meld aan

Simbools wat hier gebruik word

Maak enige simbool van die volledige definisie,'n prent en wat elke letter daarin beteken.

Vrae wat mense vra

What is a group, in plain words?

A set with one operation that is associative, has an identity, and lets every element be undone. Symmetries of any object form a group. That is where the idea came from.

What is the difference between a ring and a field?

A ring has addition and multiplication that behave like the integers (you cannot always divide); a field is a ring where every non-zero element has a reciprocal, like the rationals or the reals.

Dele van hierdie bladsy word aangepas Judson, Abstract Algebra: Theory and Applications (GFDL 1.3). Verklaar en weer opklaar hier, foute is ons s'n.

Meer in Abstract Algebra