The creators describe this item: "Winter evenings during pandemics can get long, so we decided to rewrite some familiar Christmas carols. We sent them to family and friends." The re-written Christmas carols have sometimes humorous lyrics related to the pandemic, and many include sheet music. The original carols are "Twelve Days of Christmas," "...
Creator:
Rauvola, Suzanne; Rauvola, Brian
Created:
2020-12
Contributed By:
Archives and Special Collections, Kathryn A. Martin Library, University of Minnesota Duluth
The 1963 work of Kervaire-Milnor on the classification of exotic spheres in terms of the stable homotopy groups of spheres left one unanswered question in dimensions congruent to two modulo four. Subsequent work by Brown-Peterson and Browder gave the answer in all dimensions that are not two less than a power of two. We solve the problem in all ...
Creator:
Ravenel, Douglas Conner (University of Rochester)
Created:
2012-02-01
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Cartographic Details: Scale 1:5,000,000 ; conic proj. Accompanied by index. Inset: India showing military stations and railways, languages, religions -- town plans of Bombay, Calcutta, Madras, etc. Relief shown as hachures and heights in feet. Shows: international and administrative boundaries, railways, canals.
Creator:
Ravenstein, Ernst George, 1834-1913. George Philip & Son.
Created:
1900
Contributed By:
University of Minnesota Libraries, John R. Borchert Map Library.
Modern problems across science and engineering increasingly require high-dimensional modeling: models with more parameters than observations. It is now well understood that statistically reliable inference is still possible under such high-dimensional settings, provided one restricts to constrained subclasses of models with particular low-dimens...
Creator:
Ravikumar, Pradeep (The University of Texas at Austin)
Created:
2012-03-27
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Joint work with Akos Dobay, John C. Kern, Kenneth C. Millett,Michael Piatek,Patrick Plunkett, and Andrzej Stasiak.We explore the shape of random polygons by measuring theaveragedimensions of smallest boxes, spheres, and polyhedra thatenclose thepolygons. We present computer simulations to examine thedifferencesbetween these dimensions for polygo...
Creator:
Rawdon, Eric J. (University of St. Thomas)
Created:
2007-09-16
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
If we specialize algebraic equations having goodproperties, we usually face degeneracies. Starting with a badspecialization, we can try to improve it , performing modificationsunder control. If we succeed to get a new specialization with theinitial good properties preserved,we get a permanence statement.We shall present examples of permanence wi...
Creator:
Raynaud, Michel (Université de Paris XI (Paris-Sud))
Created:
2011-01-04
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Flag Algebras is a general method for proving results in asymptoticextremal combinatorics that can be loosely described as 'systematic counting based on semi-definite programming'.The concrete results proven via this method can be (again, loosely) classified into two groups of unequal size. Brute-forceapplications use counting only; the role of ...
Creator:
Razborov, Alexander (University of Chicago)
Created:
2014-09-11
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
We present a new uniqueness result for solutions to Fokker€“Planck€“Kolmogorov (FPK) equations for probability measures on infinite-dimensional spaces. We consider infinite-dimensional drifts that admit certain finite dimensional approximations. In contrast to most of the previous work on FPK-equations in infinite dimensions, we include cases wi...
Creator:
Röckner, Michael (Universität Bielefeld)
Created:
2013-01-17
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
This is joint work with Viorel Barbu (Romanian Academy, Iasi).We extend the approach of variational inequalities (VI) to partial differential equations (PDE) with singular coefficients, to the stochastic case. As a model case we concentrate on the parabolic 1-Laplace equation (a PDE with highly singular diffusivity) on a bounded convex domain in...
Creator:
Röckner, Michael (Universität Bielefeld)
Created:
2012-10-24
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
We will report on our experiences implementing PDE solvers on Peta-Scale computers, such as the 290 000 core IBM Blue Gene system in the Jülich Supercomputing Center. The talk will have two parts, the first one reporting on our Hierarchical Hybrid Grid method, a prototype Finite Element Multigrid Solver scaling up to a trillion (10^12) degrees ...
I will begin the talk by outlining (hopefully with help from the audience) what data we might want to compute (1) for each cluster variable (2) for each cluster and (3) for each cluster algebra. I will then discuss how the combinatorics of sortable elements can be applied to these problems. This leads naturally to a discussion of computation in ...
Creator:
Reading, Nathan (North Carolina State University)
Created:
2015-06-03
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Shows additions, lot numbers, street names, and railroads. Inset: Map showing relation of Oregon City & Vancouver to Portland. "Prepared for Borthwick, Batty & Co., dealers in real estate and loans." City boundary highlighted with red overprint. Map has public land (township, range, and section) grid. Map carries the logo of the Union ...
Creator:
Real Estate Title and Trust Co. (Portland, Or.); Whitney, W. H.; Everts & Howell.
Created:
1889
Contributed By:
University of Minnesota Libraries, John R. Borchert Map Library.
Raymond Rea is a Italian-English-American-white trans male raised in Massachusetts. At the time of this oral history, Rea was working as a Professor in the School of Media Arts & Design at Minnesota State - Moorhead. In this oral history, Rea speaks at length about the geographies of Minnesota, Massachusetts, and San Francisco; the San Francisco...
Creator:
Rea, Raymond
Contributor:
Jenkins, Andrea (Interviewer)
Created:
2016-10-16
Contributed By:
University of Minnesota Libraries, Jean-Nickolaus Tretter Collection in Gay, Lesbian, Bisexual and Transgender Studies.
One of the most ubiquitous problems arising across the sciences is that of solving large-scale systems of linear equations Ax = b. When it is infeasible to solve the system directly by inversion, light and scalable iterative methods can be used instead, such as, Randomized Kaczmarz (RK) algorithm, or Stochastic Gradient Descent (SGD). The classi...
Creator:
Rebrova, Elizaveta (University of California, Los Angeles)
Created:
2021-04-13
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Uterine curette. Metal curette with octagonal handle, long shank that is slightly curved at the end, and teardrop-shaped, fenestrated blade with a slight convex curve.
Creator:
Récamier, Joseph Claude Anthelme,"(1774-1852)
Created:
1880 - 1920?
Contributed By:
University of Minnesota Libraries, Owen H. Wangensteen Historical Library of Biology and Medicine.
Uterine curette. Nickel-plated instrument that has a teardrop-shaped fenestrated blade with a slight convex curve; shank is tapered near blade and widens out near handle; shank contains the Kny-Scheerer logo of an S-shape curled around a staff topped with a crown; metal handle with hexagonal facets. Includes manufacturer markings:"KNY-SCHEERER -...
Creator:
Récamier, Joseph Claude Anthelme,"(1774-1852)
Contributor:
Kny-Scheerer Company (Germany)
Created:
1896 - 1920?
Contributed By:
University of Minnesota Libraries, Owen H. Wangensteen Historical Library of Biology and Medicine.
Uterine curette. Nickel-plated instrument that has a teardrop-shaped fenestrated blade with a slight convex curve; long, cylindrical shank; shank contains the Kny-Scheerer logo of an S-shape curled around a staff topped with a crown; handle is an elongated oval loop.
Creator:
Récamier, Joseph Claude Anthelme,"(1774-1852)
Contributor:
Kny-Scheerer Company
Created:
1896 - 1920?
Contributed By:
University of Minnesota Libraries, Owen H. Wangensteen Historical Library of Biology and Medicine.
Video featuring items from the Ukrainian Folk Ballet of the Twin Cities collection held by the Immigration History Research Center at the University of Minnesota. It was created in August 2012 by graduate research assistant Raphi Rechitsky (PhD candidate, Sociology). The video is accompanied by music performed by a Twin Cities band "Seljuki."
Creator:
Rechitsky, Raphi
Contributor:
Seljuki (band)
Created:
1912-08
Contributed By:
University of Minnesota Libraries, Immigration History Research Center Archives.
Stochastic Gradient Descent (SGD) is a popular optimization algorithm for solving data-driven machine learning problems such as classification, model selection, sequence labeling, and recommendation. SGD is well suited to processing large amounts of data due to its robustness against noise, rapid convergence rates, and predictable memory footpri...
Creator:
Recht, Ben (University of Wisconsin, Madison)
Created:
2012-03-28
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Here we demonstrate theoretically and experimentally that a two-dimensional time-reversal invariant photonic topological insulator supports zero-dimensional defect modes that are protected to lie at the center of the band gap. The fact that they lie at mid-gap implies that they are as spatially confined as possible for a given amount of disorder...
Creator:
Rechtsman, Mikael (The Pennsylvania State University)
Created:
2016-11-04
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
Joint work with work with G. Dalzotto and A. Montes.In the talk we will deal with automatic discovery of elementary geometry theorems, through the algebraic geometry framework that has already shown its success for automatic theorem proving. Automatic discovery of theorems addresses the case of statements that are false in most relevant cases. I...
Creator:
Recio, Tomas (University of Cantabria)
Created:
2007-05-30
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
