Top Qs
Timeline
Chat
Perspective

Hua's identity

Formula relating pairs of elements in a division ring From Wikipedia, the free encyclopedia

Remove ads

In algebra, Hua's identity[1] named after Hua Luogeng, states that for any elements a, b in a division ring, whenever . Replacing with gives another equivalent form of the identity:

Remove ads

Hua's theorem

The identity is used in a proof of Hua's theorem,[2] which states that if is a function between division rings satisfying then is a homomorphism or an antihomomorphism. This theorem is connected to the fundamental theorem of projective geometry.

Remove ads

Proof of the identity

One has

The proof is valid in any ring as long as are units.[3]

Remove ads

References

Loading related searches...

Wikiwand - on

Seamless Wikipedia browsing. On steroids.

Remove ads