Onto Homomorphism: G/H Isomorphic to K

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SUMMARY

The discussion centers on the mathematical concept of homomorphisms, specifically regarding the isomorphism between the quotient group G/H and the group K. The user seeks to establish a homomorphism λ: G → K with the kernel of λ being HI. The First Isomorphism Theorem is referenced as a potential tool for solving this problem, emphasizing the need to find a surjective homomorphism θ: G → G/H with ker θ = H. The composition of θ and the isomorphism φ: G/H → K is crucial for deriving the desired result.

PREREQUISITES
  • Understanding of group theory concepts, particularly homomorphisms and isomorphisms.
  • Familiarity with the First Isomorphism Theorem in abstract algebra.
  • Knowledge of quotient groups and their properties.
  • Basic skills in composing functions within mathematical contexts.
NEXT STEPS
  • Study the First Isomorphism Theorem in detail to understand its applications.
  • Explore the properties of quotient groups and their significance in group theory.
  • Learn about the construction of homomorphisms and their kernels.
  • Investigate examples of surjective homomorphisms to solidify understanding of the concepts.
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Mathematicians, students of abstract algebra, and anyone studying group theory who seeks to deepen their understanding of homomorphisms and isomorphisms.

Punkyc7
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If G/H is \cong K show there exist an homomorphism which is ont λ:G \rightarrow K with the kernel of λ=HI am having a hard time figuring out what this should be. I have a feeling it is easy if you know how to look at it.

I have been trying the First Isomorphism Theorem but I can't seem to get.

Any help would e greatly appreciated.
 
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You have an isomorphism \phi : G/H \rightarrow K. Can you find a surjective homomorphism \theta : G \rightarrow G/H which has ker \theta = H? What happens when you compose \theta with \phi?
 

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