thank you Charles for the explanations and the valuable and rich example.
indeed there is a gems inside the examples.
regarding the heat, you may set internaly a temporary limitation to the recursivity levels, until you find a solution to prevent the program from floating in the memory without ending.
i was not aware about the heat until the "pc probe 2" utility for the asus motherboards have warned me loudly after 3 minutes of running fibonacci(60) while i am in another room.
thanks and best wishes
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