Changes between Initial Version and Version 1 of Ticket #16926, comment 31


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Timestamp:
02/18/15 16:59:12 (7 years ago)
Author:
darij
Comment:

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  • Ticket #16926, comment 31

    initial v1  
    55- The meaning of the index_set parameter: is it just there to allow building the symmetric group algebra with different basis keys?
    66
    7 - _coerce_map_from_ claims that there exists a coercion from SymmetricGroup(3).algebra(QQ) to SymmetricGroupAlgebra(QQ, 3), but applying this coercion to elements fails. This is because `StandardPermutations_n_abstract.__call__` does not take a permutation group element as a parameter. I am not sure what to do about it, since I wouldn't be happy with duck-typing in that constructor.
     7- _coerce_map_from_ claims that there exists a coercion from `SymmetricGroup(3).algebra(QQ)` to `SymmetricGroupAlgebra(QQ, 3)`, but applying this coercion to elements fails. This is because `StandardPermutations_n_abstract.__call__` does not take a permutation group element as a parameter. I am not sure what to do about it, since I wouldn't be happy with duck-typing in that constructor.
     8
     9- Various methods don't work for `SymmetricGroup(3).algebra(QQ)`, and the fix is not as simple as adding `index_set=self.basis().keys()`.