Matsumoto's theorem is the statement that the set of all reduced words for an element of a Coxeter group is spanned and preserved by the group's so-called 'braid relations.' Hu and Zhang have recently proved an analogue of this classical theorem for certain variants of reduced words for involutions in classical Weyl groups. Hu and Zhang's proof ...
Creator:
Marberg, Eric (Hong Kong University of Science and Technology)
Created:
2017-08-24
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
An exhibition of the Automatic Ticket Issuing Machine and a [Sensimatic]. On the left, three men stand around a ticket counter, installed in which is the Burroughs Automatic Ticket Issuing machine. A sign next to the counter reads: "Hear it is! The New Burroughs Automatic Ticket Issuing Machine for Railroad, Bus Lines, Airlines." On the right, t...
Created:
1950
Contributed By:
University of Minnesota Libraries, Charles Babbage Institute.
A man and woman demonstrating the "Ticketeer" automatic ticket issuing machine. The woman, on the left, pulls a line of tickets from the machine while the man, on the right, holds a flat metal lever.
Created:
1949
Contributed By:
University of Minnesota Libraries, Charles Babbage Institute.
Automatic teller machine installed in Quincy National Bank's 1st Card "Automatic Teller Machine" drive up kiosk. Kiosk is built in the shape of a 1. Possibly located in Quincy, Illinois.
Contributed By:
University of Minnesota Libraries, Charles Babbage Institute.
Automatic differentiation methods in computational dynamical systems: invariant manifolds and normal formsInvariant Objects in Dynamical Systems and their applications
Creator:
Haro, Alex (University of Barcelona)
Created:
2011-06-20
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
A highly accurate and efficient method for molecular globalpotential energy surface (PES) construction and fitting isdemonstrated. An interpolating moving least-squares (IMLS)method using low-density ab initio potential, gradient, orHessian values to compute PES parameters is shown to lead to anaccurate and efficient PES representation. The meth...
Creator:
Thompson, Donald L. (University of Missouri)
Created:
2009-01-12
Contributed By:
University of Minnesota, Institute for Mathematics and its Applications.
The Indian Posts & Telegraphs Department set up this telegraph workshop at Alipore, Calcutta in early 1855 as a repair workshop, and gradually it started production of Telegraph and Telecom equipment. This workshop supplied Telegraph/Telecom materials throughout India (including the territory of Burma prior to 1937). This is one of a set of 45 p...
Created:
1920 - 1929
Contributed By:
University of Minnesota Libraries, Ames Library of South Asia.
Interior of the Carlsbad plant with automated facilities for plating and etching circuits and disks. There are at least eight assembly or process lines in the facility. A few employees can be seen.
Created:
1970
Contributed By:
University of Minnesota Libraries, Charles Babbage Institute.
The two signatures were obtained at the wedding of Anuj Ambalal and Sujata Mehta which the two artists attending. Lacking a sheet of paper they signed a napkin, and, alas, over time the ink has faded the signatures can no longer be seen.
Autographed photo in Italian addressed to Vincenzo Procopio. The handwritten date "Nov. XVII" refers to the seventeenth year of the fascist revolution (1939).
Created:
1939?
Contributed By:
University of Minnesota Libraries, Immigration History Research Center Archives.
