 | 1 | initial version |
I'm able to do this:
sage: f = function('radius', nargs=1, evalf_func=Graph.radius)
sage: f(graphs.HouseGraph())
2
But not this:
sage: var('G')
sage: expr = f(G)
sage: expr.subs(G=graphs.HouseGraph())
...
TypeError: no canonical coercion from <class 'sage.graphs.graph.Graph'> to Symbolic Ring
What am I missing? Is it not possible to use symbolic expressions like this?
| | 2 | retagged |
I'm able to do this:
sage: f = function('radius', nargs=1, evalf_func=Graph.radius)
sage: f(graphs.HouseGraph())
2
But not this:
sage: var('G')
sage: expr = f(G)
sage: expr.subs(G=graphs.HouseGraph())
...
TypeError: no canonical coercion from <class 'sage.graphs.graph.Graph'> to Symbolic Ring
What am I missing? Is it not possible to use symbolic expressions like this?
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