Implement .opposite() for algebras

[Eloitor]

Problem Description

Given a quaternion algebra B, I didn't find a direct way to construct the opposite algebra,

Proposed Solution

B.opposite() could give the opposite algebra.

Alternatives Considered

I could manually do:

sage: B.<i,j,k> = QuaternionAlgebra(5)
sage: B
Quaternion Algebra (-2, -5) with base ring Rational Field
sage: A = QuaternionAlgebra(*reversed(invs), names=(B.gen(1), B.gen(0), B.gen(2)))
sage: j,i,k = A.gens()
sage: j*i
k

Additional Information

No response

Is there an existing issue for this?

• I have searched the existing issues for a bug report that matches the one I want to file, without success.