The Number of Unary Clones Containing the Permutations on an Infinite Set

@inproceedings{Pinsker2008TheNO,
  title={The Number of Unary Clones Containing the Permutations on an Infinite Set},
  author={Michael Pinsker},
  year={2008}
}
We calculate the number of unary clones (submonoids of the full transformation monoid) containing the permutations, on an infinite base set. It turns out that this number is quite large, on some cardinals as large as the whole clone lattice. Moreover we find that, with one exception, even the cardinalities of the intervals between the monoid of all permutations and the maximal submonoids of the full transformation monoid are as large. Whether or not the only exception is of the same cardinality… CONTINUE READING

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