Abstract
In this short note, a new approach is provided to prove that every nonzero continuous cosine function on a compact group $G$ is the normalized character of a representation of $G$ into the special unitary group $SU(2)$.
Citation
Dilian Yang. "Cosine functions revisited." Banach J. Math. Anal. 5 (2) 126 - 130, 2011. https://doi.org/10.15352/bjma/1313363008
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