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summary:In this paper we show that well-known relationships connecting the Clifford algebra on negative euclidean space, Vahlen matrices, and Möbius transformations extend to connections with the Möbius loop or gyrogroup on the open unit ball $B$ in $n$-dimensional euclidean space $\mathbb R^n$. One notable achievement is a compact, convenient formula for the Möbius loop operation $a\ast b=(a+b)(1-ab)^{-1}$, where the operations on the right are those arising from the Clifford algebra (a formula comparable to $(w+z)(1+\overline wz)^{-1}$ for the Möbius loop multiplication in the unit complex disk)

Involutory decomposition of groups into twisted subgroups and subgroups