Mini-blog
Check this page occasionally to see what's up with Dr. Julius.
Posts reflect the opinions of Dr. Julius and no one else.
Check this page occasionally to see what's up with Dr. Julius.
Posts reflect the opinions of Dr. Julius and no one else.
We were delighted to learn of a basis for the split octonion algebras not depending on scalars from the base field -- found in a 2024 paper by Bray, Stepanov, and Wilson.
October 24, 2025
In this paper, my co-authors and I describe Jordan and Lie derivations of alternative rings, mostly on special classes of rings including alternative division rings and split octonion algebras. On associative structures, Jordan derivations are often just derivations in the usual sense, but for alternative rings, we show that a functional identity on the ring must be further assumed. Lie derivations turn out to be just ordinary derivations plus maps in the center... just like the associative case! I really enjoyed working on this paper.
May 31, 2025
Just got back from a trip to Japan! In addition to the outstanding food, public transit, nature parks and many unforgettable experiences, I had the benefit of unplugging from work for the first time in years. My favorite things were Hiroshima's Peace Memorial Park, seeing Mt. Fuji up-close, and soaking in sulfur-rich hot springs. And the food...
A multiplication table for an eight-dimensional octonion algebra. The elements i_k are the canonical basis arising from the Cayley-Dickson construction. The c_k are nonzero scalars from a base field.
December 3, 2024
I am happy to announce my newest paper. We characterize fixed product preserving mappings on Cayley-Dickson algebras of characteristic not 2 (a multiplication table for a CD algebra is shown to the left). There's some surprises in there. Jordan homomorphisms of octonion algebras are not easily describable in terms of automorphisms and anti-automorphisms. Fixed product preserving maps therefore have interesting forms, but zero product preserving maps (for split CD algebras) are essentially ring homomorphisms. It also turns out that finite-dimensional alternative algebras are zero product determined. Nice.
September 20, 2024
I am happy to announce the publication of my newest paper. It is on maps preserving inverses on alternative division rings. The paper is largely a test case for maps satisfying some kind of weak inverse identity: f(x)f(y)f(x) = f(x) whenever xyx = x, where the latter defines the weak inverse. In particular, the relationship to Jordan automorphisms and there's some interesting phenomena for characteristic 2.
The column headers are Jordan homomorphisms of a two-dimensional field extension of the Galois field of two elements. Weird.
July 1, 2024
I am delighted to announce that I am joining the Math, Applied Math, and Statistics faculty at Case Western Reserve University, starting Fall 2024, as an Instructor of Mathematics.
Thank you to my previous institution, Niagara University, for investing in me. I regret not being able to stay longer. Best wishes to everyone past, present, and future at Niagara University!