Results 41 to 50 of about 3,106,186 (149)

A relative Poincaré–Birkhoff theorem

open access: yesBulletin of the London Mathematical Society, Volume 58, Issue 7, July 2026.
Abstract A. Moreno and Otto van Koert proved a generalised version of the classical Poincaré–Birkhoff theorem, for Liouville domains of any dimension. In this article, we prove a relative version for Lagrangians with Legendrian boundary. This gives interior chords of arbitrary large length, provided that the twist condition introduced by Moreno and van
Agustin Moreno, Arthur Limoge
wiley   +1 more source

Tangency bifurcations of global Poincare maps [PDF]

open access: yes, 2007
One tool to analyze the qualitative behavior of a periodic orbit of a vector field in R^n is to consider the Poincare return map to an (n-1)-dimensional section.
Judd, CM   +10 more
core   +1 more source

Invariant tori of the Poincare return map as solutions of functional difference equations

open access: yes, 1991
Functional difference equations characterize the invariant surfaces of the Poincare return map of a general Hamiltonian system. Two different functional equations are derived.
Warnock, R.L.
core  

Prospect Green Map: a community map of environmental, historical, cultural, civic, and recreational sites

open access: yes
A map detailing the sites of interest and importance in the Prospect, NC, and the Robeson County area of North Carolina.
Robeson County Green Map Project
core   +1 more source

Southeast Asia 1:250,000 [cartographic material] /

open access: yes, 1954
Various eds. "Constructed and molded in ... from ... 1:250,000, Series 1501 ..."; Also shows aeronautical information.; Includes index to adjoining sheets and glossary.; Raised relief model map series of Southeast Asia (Thailand and Indochina) showing ...
United States. Army Map Service.
core  

Natural hazards map of the Circum-Pacific Region [cartographic material] : Pacific Basin sheet /

open access: yes, 1992
Map modified 1992.; Depths shown by isolines.; "This map is a contribution to the International Decade for Natural Disaster Reduction (IDNDR)."; Accompanied by: Explanatory notes for the Natural hazards map of the Circum-Pacific region Pacific Basin ...
Circum-Pacific Map Project.
core  

Austin 1921 New Key Map

open access: yes, 1921
Sanborn map key for Austin in Travis County, Texas, showing the areas covered by numbered map sheets that contain more precise details related to risk assessment for fire ...
Sanborn Map Company
core  

Sulu Archipelago 1:50,000 [cartographic material] /

open access: yes, 1944
1st ed. (AMS 1). Topographic maps of the Sulu Archipelago, Philippines. Relief shown by soundings, spot heights, contours, and form lines where shown at approximately 100 foot intervals, heights and depths in feet.; Standard map series designation ...
United States. Army Map Service.
core  

Korea 1:250,000 [cartographic material] /

open access: yes, 1950
1st ed. - AMS. "Constructed and molded from Korea 1:250,000 AMS L552."; Each map is individually titled by area and numbered within the series.; Topographic raised relief model map series of Korea showing populated places, roads, railroads, international
United States. Army Map Service.
core  

Manchuria : AMS L542, Index Map

open access: yes, 2023
Scale 1:250,000. Approximately 200 maps : color ; 47 x 72 cm or smaller. Relief shown by contours and spot heights. "Prepared by the Army Map Service (AM), Corps of Engineers, U.S.
United States. Army Map Service.
core  

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