@inbook {RicKor-GDG-2001,
	title = {Grundlagen Dynamischer Geometrie},
	booktitle = {Zeichnung {\textendash} Figur {\textendash} Zugfigur},
	year = {2001},
	pages = {123{\textendash}144},
	publisher = {Franzbecker},
	organization = {Franzbecker},
	address = {Hildesheim, Berlin},
	abstract = {<p>
	In this article we present fundamental definitions that can be used to introduce a mathematical model for dynamic geometry. Starting from reasonable expectations that such a model should meet we will formalize the terms (dynamic) construction, instance of a construction and Dynamic-Geometry-System (DGS). The behavior of a DGS will be described by the terms conservatism and continuity. One of the main results of this article is that we can find a continuous DGS for any construction Z that is built up using algebraic basic construction steps only.</p>
},
	keywords = {refereed},
	url = {http://kortenkamps.net/papers/2001/DG_OW1.pdf},
	author = {Richter-Gebert, J{\"u}rgen and Kortenkamp, Ulrich},
	editor = {Henn, Hans-Wolfgang and Elschenbroich, Hans-J{\"u}rgen and Gawlick, Thomas}
}
