MODERN GEOMETRY II MA 321 Catalogue Description the Three
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Five-Dimensional Design
PERIODICA POLYTECHNICA SER. CIV. ENG. VOL. 50, NO. 1, PP. 35–41 (2006) FIVE-DIMENSIONAL DESIGN Elek TÓTH Department of Building Constructions Budapest University of Technology and Economics H–1521 Budapest, POB. 91. Hungary Received: April 3 2006 Abstract The method architectural and engineering design and construction apply for two-dimensional rep- resentation is geometry, the axioms of which were first outlined by Euclid. The proposition of his 5th postulate started on its course a problem of geometry that provoked perhaps the most mistaken demonstrations and that remained unresolved for two thousand years, the question if the axiom of parallels can be proved. The quest for the solution of this problem led Bolyai János to revolutionary conclusions in the wake of which he began to lay the foundations of a new (absolute) geometry in the system of which planes bend and become hyperbolic. It was Einstein’s relativity theory that eventually created the possibility of the recognition of new dimensions by discussing space as well as a curved, non-linear entity. Architectural creations exist in what Kant termed the dual form of intuition, that is in time and space, thus in four dimensions. In this context the fourth dimension is to be interpreted as the current time that may be actively experienced. On the other hand there has been a dichotomy in the concept of time since ancient times. The introduction of a time-concept into the activity of the architectural designer that comprises duration, the passage of time and cyclic time opens up a so-far unknown new direction, a fifth dimension, the perfection of which may be achieved through the comprehension and the synthesis of the coded messages of building diagnostics and building reconstruction. -
Squaring the Circle in Elliptic Geometry
Rose-Hulman Undergraduate Mathematics Journal Volume 18 Issue 2 Article 1 Squaring the Circle in Elliptic Geometry Noah Davis Aquinas College Kyle Jansens Aquinas College, [email protected] Follow this and additional works at: https://scholar.rose-hulman.edu/rhumj Recommended Citation Davis, Noah and Jansens, Kyle (2017) "Squaring the Circle in Elliptic Geometry," Rose-Hulman Undergraduate Mathematics Journal: Vol. 18 : Iss. 2 , Article 1. Available at: https://scholar.rose-hulman.edu/rhumj/vol18/iss2/1 Rose- Hulman Undergraduate Mathematics Journal squaring the circle in elliptic geometry Noah Davis a Kyle Jansensb Volume 18, No. 2, Fall 2017 Sponsored by Rose-Hulman Institute of Technology Department of Mathematics Terre Haute, IN 47803 a [email protected] Aquinas College b scholar.rose-hulman.edu/rhumj Aquinas College Rose-Hulman Undergraduate Mathematics Journal Volume 18, No. 2, Fall 2017 squaring the circle in elliptic geometry Noah Davis Kyle Jansens Abstract. Constructing a regular quadrilateral (square) and circle of equal area was proved impossible in Euclidean geometry in 1882. Hyperbolic geometry, however, allows this construction. In this article, we complete the story, providing and proving a construction for squaring the circle in elliptic geometry. We also find the same additional requirements as the hyperbolic case: only certain angle sizes work for the squares and only certain radius sizes work for the circles; and the square and circle constructions do not rely on each other. Acknowledgements: We thank the Mohler-Thompson Program for supporting our work in summer 2014. Page 2 RHIT Undergrad. Math. J., Vol. 18, No. 2 1 Introduction In the Rose-Hulman Undergraduate Math Journal, 15 1 2014, Noah Davis demonstrated the construction of a hyperbolic circle and hyperbolic square in the Poincar´edisk [1]. -
Elliptic Geometry Hawraa Abbas Almurieb Spherical Geometry Axioms of Incidence
Elliptic Geometry Hawraa Abbas Almurieb Spherical Geometry Axioms of Incidence • Ax1. For every pair of antipodal point P and P’ and for every pair of antipodal point Q and Q’ such that P≠Q and P’≠Q’, there exists a unique circle incident with both pairs of points. • Ax2. For every great circle c, there exist at least two distinct pairs of antipodal points incident with c. • Ax3. There exist three distinct pairs of antipodal points with the property that no great circle is incident with all three of them. Betweenness Axioms Betweenness fails on circles What is the relation among points? • (A,B/C,D)= points A and B separates C and D 2. Axioms of Separation • Ax4. If (A,B/C,D), then points A, B, C, and D are collinear and distinct. In other words, non-collinear points cannot separate one another. • Ax5. If (A,B/C,D), then (B,A/C,D) and (C,D/A,B) • Ax6. If (A,B/C,D), then not (A,C/B,D) • Ax7. If points A, B, C, and D are collinear and distinct then (A,B/C,D) , (A,C/B,D) or (A,D/B,C). • Ax8. If points A, B, and C are collinear and distinct then there exists a point D such that(A,B/C,D) • Ax9. For any five distinct collinear points, A, B, C, D, and E, if (A,B/E,D), then either (A,B/C,D) or (A,B/C,E) Definition • Let l and m be any two lines and let O be a point not on either of them. -
+ 2R - P = I + 2R - P + 2, Where P, I, P Are the Invariants P and Those of Zeuthen-Segre for F
232 THE FOURTH DIMENSION. [Feb., N - 4p - (m - 2) + 2r - p = I + 2r - p + 2, where p, I, p are the invariants p and those of Zeuthen-Segre for F. If I is the same invariant for F, since I — p = I — p, we have I = 2V — 4p — m = 2s — 4p — m. Hence 2s is equal to the "equivalence" in nodes of the point (a, b, c) in the evaluation of the invariant I for F by means of the pencil Cy. This property can be shown directly for the following cases: 1°. F has only ordinary nodes. 2°. In the vicinity of any of these nodes there lie other nodes, or ordinary infinitesimal multiple curves. In these cases it is easy to show that in the vicinity of the nodes all the numbers such as h are equal to 2. It would be interesting to know if such is always the case, but the preceding investigation shows that for the applications this does not matter. UNIVERSITY OF KANSAS, October 17, 1914. THE FOURTH DIMENSION. Geometry of Four Dimensions. By HENRY PARKER MANNING, Ph.D. New York, The Macmillan Company, 1914. 8vo. 348 pp. EVERY professional mathematician must hold himself at all times in readiness to answer certain standard questions of perennial interest to the layman. "What is, or what are quaternions ?" "What are least squares?" but especially, "Well, have you discovered the fourth dimension yet?" This last query is the most difficult of the three, suggesting forcibly the sophists' riddle "Have you ceased beating your mother?" The fact is that there is no common locus standi for questioner and questioned. -
Lecture 3: Geometry
E-320: Teaching Math with a Historical Perspective Oliver Knill, 2010-2015 Lecture 3: Geometry Geometry is the science of shape, size and symmetry. While arithmetic dealt with numerical structures, geometry deals with metric structures. Geometry is one of the oldest mathemati- cal disciplines and early geometry has relations with arithmetics: we have seen that that the implementation of a commutative multiplication on the natural numbers is rooted from an inter- pretation of n × m as an area of a shape that is invariant under rotational symmetry. Number systems built upon the natural numbers inherit this. Identities like the Pythagorean triples 32 +42 = 52 were interpreted geometrically. The right angle is the most "symmetric" angle apart from 0. Symmetry manifests itself in quantities which are invariant. Invariants are one the most central aspects of geometry. Felix Klein's Erlanger program uses symmetry to classify geome- tries depending on how large the symmetries of the shapes are. In this lecture, we look at a few results which can all be stated in terms of invariants. In the presentation as well as the worksheet part of this lecture, we will work us through smaller miracles like special points in triangles as well as a couple of gems: Pythagoras, Thales,Hippocrates, Feuerbach, Pappus, Morley, Butterfly which illustrate the importance of symmetry. Much of geometry is based on our ability to measure length, the distance between two points. A modern way to measure distance is to determine how long light needs to get from one point to the other. This geodesic distance generalizes to curved spaces like the sphere and is also a practical way to measure distances, for example with lasers. -
Feb 23 Notes: Definition: Two Lines L and M Are Parallel If They Lie in The
Feb 23 Notes: Definition: Two lines l and m are parallel if they lie in the same plane and do not intersect. Terminology: When one line intersects each of two given lines, we call that line a transversal. We define alternate interior angles, corresponding angles, alternate exterior angles, and interior angles on the same side of the transversal using various betweeness and half-plane notions. Suppose line l intersects lines m and n at points B and E, respectively, with points A and C on line m and points D and F on line n such that A-B-C and D-E-F, with A and D on the same side of l. Suppose also that G and H are points such that H-E-B- G. Then pABE and pBEF are alternate interior angles, as are pCBE and pDEB. pABG and pFEH are alternate exterior angles, as are pCBG and pDEH. pGBC and pBEF are a pair of corresponding angles, as are pGBA & pBED, pCBE & pFEH, and pABE & pDEH. pCBE and pFEB are interior angles on the same side of the transversal, as are pABE and pDEB. Our Last Theorem in Absolute Geometry: If two lines in the same plane are cut by a transversal so that a pair of alternate interior angles are congruent, the lines are parallel. Proof: Let l intersect lines m and n at points A and B respectively. Let p1 p2. Suppose m and n meet at point C. Then either p1 is exterior to ªABC, or p2 is exterior to ªABC. In the first case, the exterior angle inequality gives p1 > p2; in the second, it gives p2 > p1. -
A Survey of the Development of Geometry up to 1870
A Survey of the Development of Geometry up to 1870∗ Eldar Straume Department of mathematical sciences Norwegian University of Science and Technology (NTNU) N-9471 Trondheim, Norway September 4, 2014 Abstract This is an expository treatise on the development of the classical ge- ometries, starting from the origins of Euclidean geometry a few centuries BC up to around 1870. At this time classical differential geometry came to an end, and the Riemannian geometric approach started to be developed. Moreover, the discovery of non-Euclidean geometry, about 40 years earlier, had just been demonstrated to be a ”true” geometry on the same footing as Euclidean geometry. These were radically new ideas, but henceforth the importance of the topic became gradually realized. As a consequence, the conventional attitude to the basic geometric questions, including the possible geometric structure of the physical space, was challenged, and foundational problems became an important issue during the following decades. Such a basic understanding of the status of geometry around 1870 enables one to study the geometric works of Sophus Lie and Felix Klein at the beginning of their career in the appropriate historical perspective. arXiv:1409.1140v1 [math.HO] 3 Sep 2014 Contents 1 Euclideangeometry,thesourceofallgeometries 3 1.1 Earlygeometryandtheroleoftherealnumbers . 4 1.1.1 Geometric algebra, constructivism, and the real numbers 7 1.1.2 Thedownfalloftheancientgeometry . 8 ∗This monograph was written up in 2008-2009, as a preparation to the further study of the early geometrical works of Sophus Lie and Felix Klein at the beginning of their career around 1870. The author apologizes for possible historiographic shortcomings, errors, and perhaps lack of updated information on certain topics from the history of mathematics. -
Absolute Geometry
Absolute geometry 1.1 Axiom system We will follow the axiom system of Hilbert, given in 1899. The base of it are primitive terms and primitive relations. We will divide the axioms into five parts: 1. Incidence 2. Order 3. Congruence 4. Continuity 5. Parallels 1.1.1 Incidence Primitive terms: point, line, plane Primitive relation: "lies on"(containment) Axiom I1 For every two points there exists exactly one line that contains them both. Axiom I2 For every three points, not lying on the same line, there exists exactly one plane that contains all of them. Axiom I3 If two points of a line lie in a plane, then every point of the line lies in the plane. Axiom I4 If two planes have a point in common, then they have another point in com- mon. Axiom I5 There exists four points not lying in a plane. Remark 1.1 The incidence structure does not imply that we have infinitely many points. We may consider 4 points {A, B, C, D}. Then, the lines can be the two-element subsets and the planes the three-element subsets. 1 1.1.2 Order Primitive relation: "betweeness" Notion: If A, B, C are points of a line then (ABC) := B means the "B is between A and C". Axiom O1 If (ABC) then (CBA). Axiom O2 If A and B are two points of a line, there exists at least one point C on the line AB such that (ABC). Axiom O3 Of any three points situated on a line, there is no more than one which lies between the other two. -
Arxiv:1210.8144V1 [Physics.Pop-Ph] 29 Oct 2012 Rcs Nw Nti a Ehv Lme Oad H Brillia the Enlightenment
Possible Bubbles of Spacetime Curvature in the South Pacific Benjamin K. Tippett∗ Department of Mathematics and Statistics University of New Brunswick Fredericton, NB, E3B 5A3 Canada In 1928, the late Francis Wayland Thurston published a scandalous manuscript in purport of warning the world of a global conspiracy of occultists. Among the documents he gathered to support his thesis was the personal account of a sailor by the name of Gustaf Johansen, describing an encounter with an extraordinary island. Johansen’s descriptions of his adventures upon the island are fantastic, and are often considered the most enigmatic (and therefore the highlight) of Thurston’s collection of documents. We contend that all of the credible phenomena which Johansen described may be explained as being the observable consequences of a localized bubble of spacetime curvature. Many of his most incomprehensible statements (involving the geometry of the architecture, and variability of the location of the horizon) can therefore be said to have a unified underlying cause. We propose a simplified example of such a geometry, and show using numerical computation that Johansen’s descriptions were, for the most part, not simply the ravings of a lunatic. Rather, they are the nontechnical observations of an intelligent man who did not understand how to describe what he was seeing. Conversely, it seems to us improbable that Johansen should have unwittingly given such a precise description of the consequences of spacetime curvature, if the details of this story were merely the dregs of some half remembered fever dream. We calculate the type of matter which would be required to generate such exotic spacetime curvature. -
Of Rigid Motions) to Make the Simplest Possible Analogies Between Euclidean, Spherical,Toroidal and Hyperbolic Geometry
SPHERICAL, TOROIDAL AND HYPERBOLIC GEOMETRIES MICHAEL D. FRIED, 231 MSTB These notes use groups (of rigid motions) to make the simplest possible analogies between Euclidean, Spherical,Toroidal and hyperbolic geometry. We start with 3- space figures that relate to the unit sphere. With spherical geometry, as we did with Euclidean geometry, we use a group that preserves distances. The approach of these notes uses the geometry of groups to show the relation between various geometries, especially spherical and hyperbolic. It has been in the background of mathematics since Klein’s Erlangen program in the late 1800s. I imagine Poincar´e responded to Klein by producing hyperbolic geometry in the style I’ve done here. Though the group approach of these notes differs philosophically from that of [?], it owes much to his discussion of spherical geometry. I borrowed the picture of a spherical triangle’s area directly from there. I especially liked how Henle has stereographic projection allow the magic multiplication of complex numbers to work for him. While one doesn’t need the rotation group in 3-space to understand spherical geometry, I used it gives a direct analogy between spherical and hyperbolic geometry. It is the comparison of the four types of geometry that is ultimately most inter- esting. A problem from my Problem Sheet has the name World Wallpaper. Map making is a subject that has attracted many. In our day of Landsat photos that cover the whole world in its great spherical presence, the still mysterious relation between maps and the real thing should be an easy subject for the classroom. -
Information to Users
INFORMATION TO USERS This manuscrit has been reproduced from the microfilm master. UMI films the text directly from the original or copy submitted. Thus, some thesis and dissertation copies are in typewriter face, while others may be from any type of computer printer. The qnali^ of this reproduction is dependent upon the qnali^ of the copy submitted. Broken or indistinct print, colored or poor quality illustrations and photographs, print bleedthrough, substandard margins^ and inqnoper alignment can adversefy afreet reproductioiL In the unlikely event that the author did not send UMI a complete manuscript and there are missing pages, these will be noted. Also, if unauthorized copyright material had to be removed, a note will indicate the deletion. Oversize materials (e.g., maps, drawings, charts) are reproduced by sectioning the original, beghming at the upper left-hand comer and continuing from left to right in equal sections with small overlaps. Each original is also photographed in one exposure and is included in reduced form at the back of the book. Photogrsphs included in the original manuscript have been reproduced xerographically in this copy. Higher quali^ 6" x 9" black and white photographic prints are available for aiy photographs or illustrations appearing in this copy for an additional charge. Contact UMI directly to order. UMI A Bell & Howell Information Company 300 North Zeeb Road. Ann Arbor. Ml 48106-1346 USA 313.'761-4700 800/521-0600 ARISTOHE ON MATHEMATICAL INFINITY DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy in the Graduate School of the Ohio State University By Theokritos Kouremenos, B.A., M.A ***** The Ohio State University 1995 Dissertation Committee; Approved by D.E. -
A Brief Survey of Elliptic Geometry
A Brief Survey of Elliptic Geometry By Justine May Advisor: Dr. Loribeth Alvin An Undergraduate Proseminar In Partial Fulfillment of the Degree of Bachelor of Science in Mathematical Sciences The University of West Florida April 2012 i APPROVAL PAGE The Proseminar of Justine May is approved: ________________________________ ______________ Lori Alvin, Ph.D., Proseminar Advisor Date ________________________________ ______________ Josaphat Uvah, Ph.D., Committee Chair Date Accepted for the Department: ________________________________ ______________ Jaromy Kuhl, Ph.D., Chair Date ii Abstract There are three fundamental branches of geometry: Euclidean, hyperbolic and elliptic, each characterized by its postulate concerning parallelism. Euclidean and hyperbolic geometries adhere to the all of axioms of neutral geometry and, additionally, each adheres to its own parallel postulate. Elliptic geometry is distinguished by its departure from the axioms that define neutral geometry and its own unique parallel postulate. We survey the distinctive rules that govern elliptic geometry, and some of the related consequences. iii Table of Contents Page Title Page ……………………………………………………………………….……………………… i Approval Page ……………………………………………………………………………………… ii Abstract ………………………………………………………………………………………………. iii Table of Contents ………………………………………………………………………………… iv Chapter 1: Introduction ………………………………………………………………………... 1 I. Problem Statement ……….…………………………………………………………………………. 1 II. Relevance ………………………………………………………………………………………………... 2 III. Literature Review …………………………………………………………………………………….