Instructions for Authors
The geometry models in this archive cover a broad range of mathematical
topics from geometry, topology, and to some extend from numerics. Examples are
geometric surfaces, algebraic surfaces, topological knots, simplicial
complexes, vector fields, curves on surfaces. In cases, the archive also
accepts experimental data from numerical finite element simulations to allow
validation of experiments by others.
This copyright transfer provides the legal basis such that the publisher of
this archive may exhibit and publish the digital models and the accompanying
data on this server and on all types of future publication media.
Submission of a model implies that the model has not been published before, except perhaps in the form of an
abstract, part of a published lecture, review, or thesis; that
it is not under consideration for publication elsewhere; that its publication
has been approved by all authors and (if appropriate) by the institution where
the work was carried out; that, if and when the model is accepted for
publication, the authors agree to an automatic transfer of the non-exclusive right to exhibit and publish the
master models and supplemental material within this model server on any media today and in the future to the
publisher of the server;
and that the master model will not be published elsewhere in any format without the
consent of the copyright holders.
The authors retain all other copyrights, in
particular the right to publish any image of the model elsewhere.
Whenever the publisher of the archive exhibits or publishes models of the
archive then authors of the models are cited and identified as authors of the
After an author has uploaded the master file and model description, each
submission is reviewed by an editor who decides about acceptance of the model
submission based on the criteria
The strict review criteria ensure that users of the EG-Model archive obtain
reliable and persistent geometry models. For example, the availability of
certified geometry models allows to perform validatable numerical experiments.
The author is notified by email about acceptance.
A minimal model submission consists of a master file with the geometric
data of the model and a description file with numerous information about the
author, the submitted files, and the mathematics of the geometry.
|a master geometry file|
|a description file of the model|
|optionally, additional files for preview, printing, or explanatory
The master geometry file must be any of the geometry file formats JVX,OBJ,
POLY,BYU which are described on the page data
formats. These standard file formats allow easy conversion into other file
The description file must be an XML file which validates against the data
type dictionary eg-model.dtd. The DTD is the
formal specification of the XML description file.
It is recommended to supply a preview image and a smaller data set for
interactive visualization on the web.
Each model must describe either a distinguished problem of mathematical
importance or a classic geometry. For example,
|the geometry is a counter example to a conjecture, or|
|the first numerical solution of a problem, or|
|another solution to an already solved problem but having different
|having other well-distinguished properties.|
An important issue is the resolution and accuracy in which geometry models
are computed. The following criteria serve as a guide line
|use double precision for floating point number and prefer integers where
|make a triangulation as regular as possible.|
|try to use a simplicial grid which avoids gaps in meshes and double
|avoid degenerate numerical situations like thin triangles, triangles of
|reduce the size of the geometry model by removing recomputable data.|
The technical quality of a numerically obtained geometry model is hard to
measure, and the editors will decide case by case. There exist several
software tools for optimizing geometries, for example, JavaView allows to
validate and simplify geometric surfaces.