{{{ sage: V = span(QQ,[(1,1),(1,0)]) sage: W = span(QQ,[(0,1),(1,0)]) sage: V
Vector space of degree 2 and dimension 2 over Rational Field Basis matrix: [1 0] [0 1] sage: W Vector space of degree 2 and dimension 2 over Rational Field Basis matrix: [1 0] [0 1] sage: V is W False sage: V==W True sage: type(V) <class 'sage.modules.free_module.FreeModule_submodule_field_with_category'> sage: type(W) <class 'sage.modules.free_module.FreeModule_submodule_field_with_category'> }}} They are parents. Yet they are not unique. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.