Abstract
Groups of (proper) hypersubstitutions are symmetries of algebraic theories. Symmetry at this abstract level is broken at the level of concrete algebras, because the complexity of operations may vary over the orbits of a hypersubstitution group.
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Presented by R. Poeschel.
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Smith, J.D.H. On groups of hypersubstitutions. Algebra Univers. 64, 39–48 (2010). https://doi.org/10.1007/s00012-010-0087-y
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DOI: https://doi.org/10.1007/s00012-010-0087-y