Dear all,
Students discover Sage for mathematical computations,
and the functions are the most usual way to write mathematics.
So I prefer a light interface with the matrix function "trace(...)".
The determinant is a function and a method... but trace is only a method.
And .methods() aren't fully complete in Sage :
look at the previous discuss about sum (...) and .sum().
I don't understand why there is a function len(...) over lists, and NO
method .len().
map is also a function, not a method. (the other way)
I often doubt in Sage : is it a method ? is it a function ?
I have less doubts in mathematics. It's always a function.
[and in Maple I often doublt : is there a single quote in a calculus or
not ?]
After some years, students may know AND python AND mathematics,
then it's possible to have only a method .trace() for matrix,
and a system function trace for debuging... students become gurus ;-).
I believe that Maple overwrite the debug function trace in linalg.
My use of Sage prefers a system as near as possible to mathematics.
François M.
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