Fundamental definitions do not arise at the start but at the end of the exploration, because in order to define a thing you must know what it is and what it is good for.
In: A.G. Howson (ed.), Developments in Mathematical Education
Fundamental definitions do not arise at the start but at the end of the exploration, because in order to define a thing you must know what it is and what it is good for.
In: A.G. Howson (ed.), Developments in Mathematical Education