biinvariant en · ADJ
Etymology
From bi- + invariant.
Meanings
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(not-comparable) Both left-invariant and right-invariant.
In this paper we give explicit calculations of the Laplace operator's spectrum for smooth real or complex functions on all connected compact simple Lie groups of rank 3 with biinvariant Riemannian metric and establish a connection of these formulas with the number theory and ternary and binary quadratic forms..
2015, Valera Berestovskii, Irina Zubareva, Victor Svirkin, “The spectrum of the Laplace operator on connected compact simple Lie groups of rank 3”, in arXiv: