# Grammar question - defining something additionaly

Let's say that I have a function that is defined on some intervals, and on some it's not. I'd like to say that the interval which was not defined, was defined additionaly (because others were already defined). Should I use some prefix (sthdefined) for that or what should I use?

• You extend the function. If you change the domain of a funtion, you change the function. – Michael Greinecker Jan 16 '14 at 23:39
• Thanks! But I can't give you an upvote for comment... – DropDropped Jan 16 '14 at 23:41