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Non-commutative rings and algebras, non-associative algebras. Can be used in combination with ra.rings-and-algebras

15 votes
1 answer
588 views

Is the ring of quaternionic polynomials factorial?

Denote by $\mathbb{H}[x_1,\dots,x_n]$ the ring of polynomials in $n$ variables with quaternionic coefficients, where the variables commute with each other and with the coefficients. Two polynomials $P …
mikhail skopenkov's user avatar
16 votes
Accepted

Is the ring of quaternionic polynomials factorial?

Just to remove the question from the 'Unanswered' list: $(x-i)\cdot((x+i)(y+j)+1)=((y+j)(x+i)+1)\cdot(x-i)$, hence $\mathbb{H}[x,y]$ is not factorial.
mikhail skopenkov's user avatar