On Tuesday, November 5, 2013 5:53:35 AM UTC-5, Pedro Cruz wrote:
>
> The problem is to have a real logarithm function of a certain base that
> doesn't transform "it self" into log(x)/log(base).
>
> We try to study the implementation of the Sage "log" functions [1] and the
> "coercion" model [2] but all of this seems to complex for this simple
> problem.
>
> The solution we got is below and uses:
>
> 1. A sage "formal function":
> LOG_ = function('logb', x, b, print_latex_func=_LOG_latex) 2. A latex way
> to express this function: def _LOG_latex(fun,x,base=None): 3. An
> algorithm implemented as a python "def" function. def logb(x,base=e,
> factorize=False) that returns the "formal function" as an answer. Is this
> the proper way to do it in Sage ?
> Could it be better and simple?
>
>
This looks pretty useful! I wonder whether it could find a home in Sage,
though one would have to make sure that it didn't conflict with something
else.
The "best" way to do this is to use BuiltinFunction like at
sage/functions/hyperbolic.py or the like... obviously for your own purposes
this is just fine. But that one has a nice way to put in typesetting etc.
Good luck!
- kcrisman
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