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 Creator(s):
 Jonathan Hauenstein, Jose Rodriguez
 Description:
In the field of numerical algebraic geometry, positivedimensional solution sets of systems of polynomial equations are described by witness sets. In this paper, we define multiprojective witness sets which encode the multidegree information of an irreducible multiprojective variety. Our main results generalize the regeneration solving procedure, a trace test, and numerical irreducible decomposition to the multiprojective case. Examples are included to demonstrate this new approach.
 Date Created:
 20181229

 Creator(s):
 Jonathan Hauenstein, Alan Liddell, Yi Zhang
 Description:
Standard interior point methods in semidefinite programming track a solution path for a homotopy defined by a system of polynomial equations. By viewing this in the context of numerical algebraic geometry, we are able to employ techniques to handle various cases which can arise. Adaptive precision path tracking techniques can help navigate around illconditioned areas. When the optimizer is singular with respect to the firstorder optimality conditions, endgames can be used to efficiently and…
 Date Created:
 20180410

 Creator(s):
 Jonathan Hauenstein
 Description:
A common problem when analyzing models, such as a mathematical modeling of a biological process, is to determine if the unknown parameters of the model can be determined from given inputoutput data. Identifiable models are models such that the unknown parameters can be determined to have a finite number of values given inputoutput data. The total number of such values over the complex numbers is called the identifiability degree of the model. Unidentifiable models are models such that th…
 Date Created:
 20180309

 Creator(s):
 Samantha Sherman, Jonathan Hauenstein
 Description:
Computational tools in numerical algebraic geometry can be used to numerically approximate solutions to a system of polynomial equations. If the system is wellconstrained (i.e., square), Newton’s method is locally quadratically convergent near each nonsingular solution. In such cases, Smale’s alpha theory can be used to certify that a given point is in the quadratic convergence basin of some solution. This was extended to certifiably determine the reality of the corresponding sol…
 Date Created:
 20180308

 Creator(s):
 Edward Beatty
 Description:
The Mexican patent database collects data on all patents issued in Mexico from roughly 1840 to the onset of the Mexican Revolution in 1911, totaling approximately thirteen thousand five hundred (13,500) discrete patent records. At present, this is the most comprehensive record of patents issued by Mexican governments during the nineteenth century. There is no single archival or published source that contains a comprehensive list or data on Mexican patents issued over the course of the long …
 Date Created:
 20180129

 Creator(s):
 Sunny Boyd
 Description:
Mate choice strategies in a spatiallyexplicit model environment
Giordano B. S. Ferreira1, Matthias Scheutz1, and Sunny K. Boyd2 1Department of Computer Science, Tufts University, Medford, MA 02155, USA Matthias.scheutz@tufts.edu and Giordano.Ferreira@tufts.edu 2Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA Boyd.1@nd.edu (Corresponding author; phone: 5746315021; fax: 5746317413)
Keywords: mate choice, decisionmaking, agentbased modeling, f…
 Date Created:
 20171214

 Creator(s):
 Eitan Tzelgov, Daniel Pemstein, Adam Glynn, SvendErik Skaaning, Jeffrey Staton, Allen Hicken, Michael Bernhard, John Gerring, Jan Teorell, Michael Coppedge, Kelly McMann, Megan Reif, Carl Henrik Knutsen, Yiting Wang, David Altman, Staffan I. Lindberg, Matthew Kroenig, M. Steven Fish
 Description:
Data for Varieties of Democracy Project. Version 7 of these files. There is also a collection of posterior files for v.7.
 Date Created:
 2017

 Creator(s):
 Jennifer Tank
 Description:
This dataset contains data from 17 stream 15NNH4 tracer addition experiments conducted globally, with data partitioned by autotrophic uptake compartments (i.e., epilithic biofilm, filamentous algae, bryophytes/macrophytes) and heterotrophic uptake compartments (i.e., leaves, small wood, and fine particles) that comprise the base of stream food webs. The dataset includes compartmental data on N biomass and uptake as well as other physiochemical variable that describe conditions in each stream.
 Date Created:
 20170912

 Creator(s):
 Jan Teorell, Matthew Kroenig, Allen Hicken, Megan Reif, M. Steven Fish, SvendErik Skaaning, Adam Glynn, Carl Henrik Knutsen, Kelly McMann, Daniel Pemstein, David Altman, Michael Bernhard, Michael Coppedge, John Gerring, Jeffrey Staton, Eitan Tzelgov, Staffan I. Lindberg, Yiting Wang
 Description:
Posterior data of Higher Level Indices for Varieties of Democracy v.7. The code book and description of the variables can be found in the main item for this collection.
 Date Created:
 2017

 Creator(s):
 Megan Reif, Daniel Pemstein, SvendErik Skaaning, Jan Teorell, Kelly McMann, Eitan Tzelgov, Allen Hicken, Matthew Kroenig, Michael Bernhard, Michael Coppedge, M. Steven Fish, David Altman, Adam Glynn, Carl Henrik Knutsen, Jeffrey Staton, Yiting Wang, Staffan I. Lindberg, John Gerring
 Description:
Posterior data of Higher Level Indices for Varieties of Democracy v.7. The code book and description of the variables can be found in the main item for this collection.
 Date Created:
 2017

 Creator(s):
 Jeffrey Staton, John Gerring, SvendErik Skaaning, David Altman, Staffan I. Lindberg, M. Steven Fish, Matthew Kroenig, Kelly McMann, Adam Glynn, Michael Bernhard, Allen Hicken, Daniel Pemstein, Yiting Wang, Megan Reif, Jan Teorell, Carl Henrik Knutsen, Eitan Tzelgov, Michael Coppedge
 Description:
Posterior data of Higher Level Indices for Varieties of Democracy v.7. The code book and description of the variables can be found in the main item for this collection.
 Date Created:
 2017

 Creator(s):
 Adam Glynn, Megan Reif, Allen Hicken, SvendErik Skaaning, Matthew Kroenig, Jan Teorell, Staffan I. Lindberg, M. Steven Fish, Daniel Pemstein, Eitan Tzelgov, Michael Coppedge, Kelly McMann, David Altman, Jeffrey Staton, Yiting Wang, Carl Henrik Knutsen, John Gerring, Michael Bernhard
 Description:
Posterior data of Higher Level Indices for Varieties of Democracy v.7. The code book and description of the variables can be found in the main item for this collection.
 Date Created:
 2017