Changes between Initial Version and Version 1 of Ticket #28519, comment 45


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Timestamp:
10/03/19 11:22:52 (19 months ago)
Author:
egourgoulhon
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  • Ticket #28519, comment 45

    initial v1  
    2020The point is that tensor field objects (including scalar fields and differential forms) are not immutable, except for the zero element. They cannot be made immutable because, in general, they cannot be fully defined at their creation: they are defined "on the fly" by adding some piece of information like
    2121{{{
    22 s.add_expr(1+x, chart=X)
    23 t[0,1] = 1+x
     22sage: s.add_expr(1+x, chart=X)
     23sage: t[0,1] = 1+x
    2424}}}
    2525for a scalar field `s` and a tensor field `t`.