After some hesitation, he decides to go and wants Leonard, Howard and Raj to join him; they too initially hesitate as it would mean being locked in a cabin with Sheldon for three months, but finally agree.

According to him, Euclid taught at Alexandria in the time of Ptolemy I Soterwho reigned over Egypt from to bce. Medieval translators and editors often confused him with the philosopher Eukleides of Megaraa contemporary of Plato about a century before, and therefore called him Megarensis.

Sources and contents of the Elements Euclid compiled his Elements from a number of works of earlier men. Among these are Hippocrates of Chios flourished c. The latest compiler before Euclid was Theudius, whose textbook was used in the Academy and was probably the one used by Aristotle — bce.

For his subject matter Euclid doubtless drew upon all his predecessors, but it is clear that the whole design of his work was his own, culminating in the construction of the five regular solids, now known as the Platonic solids. A brief survey of the Elements belies a common belief that it concerns only geometry.

This misconception may be caused by reading no further than Books I through IV, which cover elementary plane geometry. Book I then proves elementary theorems about triangles and parallelograms and ends with the Pythagorean theorem.

The subject of Book II has been called geometric algebra because it states algebraic identities as theorems about equivalent geometric figures.

This division was renamed the golden section in the Renaissance after artists and architects rediscovered its pleasing proportions.

Book II also generalizes the Pythagorean theorem to arbitrary triangles, a result that is equivalent to the law of cosines see plane trigonometry.

Book III deals with properties of circles and Book IV with the construction of regular polygons, in particular the pentagon.

Book V shifts from plane geometry to expound a general theory of ratios and proportions that is attributed by Proclus along with Book XII to Eudoxus of Cnidus c.

While Book V can be read independently of the rest of the Elements, its solution to the problem of incommensurables irrational numbers is essential to later books. In addition, it formed the foundation for a geometric theory of numbers until an analytic theory developed in the late 19th century.

Books VII—IX contain elements of number theorywhere number arithmos means positive integers greater than 1. Beginning with 22 new definitions—such as unity, even, odd, and prime —these books develop various properties of the positive integers.

For instance, Book VII describes a method, antanaresis now known as the Euclidean algorithmfor finding the greatest common divisor of two or more numbers; Book VIII examines numbers in continued proportions, now known as geometric sequences such as ax, ax2, ax3, ax4… ; and Book IX proves that there are an infinite number of primes.

Book X, which comprises roughly one-fourth of the Elements, seems disproportionate to the importance of its classification of incommensurable lines and areas although study of this book would inspire Johannes Kepler [—] in his search for a cosmological model.

Book XI concerns the intersections of planes, lines, and parallelepipeds solids with parallel parallelograms as opposite faces.

Book XIII culminates with the construction of the five regular Platonic solids pyramid, cube, octahedron, dodecahedron, icosahedron in a given sphere, as displayed in the animation. The five Platonic solidsThese are the only geometric solids whose faces are composed of regular, identical polygons.

Placing the cursor on each figure will show it in animation. The unevenness of the several books and the varied mathematical levels may give the impression that Euclid was but an editor of treatises written by other mathematicians.

To some extent this is certainly true, although it is probably impossible to figure out which parts are his own and which were adaptations from his predecessors. Renditions of the Elements In ancient times, commentaries were written by Heron of Alexandria flourished 62 cePappus of Alexandria flourished c.

The father of HypatiaTheon of Alexandria c. The immense impact of the Elements on Islamic mathematics is visible through the many translations into Arabic from the 9th century forward, three of which must be mentioned: Euclid first became known in Europe through Latin translations of these versions.

The first extant Latin translation of the Elements was made about by Adelard of Bathwho obtained a copy of an Arabic version in Spain, where he traveled while disguised as a Muslim student.

Adelard also composed an abridged version and an edition with commentary, thus starting a Euclidean tradition of the greatest importance until the Renaissance unearthed Greek manuscripts. Incontestably the best Latin translation from Arabic was made by Gerard of Cremona c.

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The first direct translation from the Greek without an Arabic intermediary was made by Bartolomeo Zamberti and published in Vienna in Latin inand the editio princeps of the Greek text was published in Basel in by Simon Grynaeus.

Other writings The Euclidean corpus falls into two groups: Some of the propositions can be viewed as geometry exercises to determine if a figure is constructible by Euclidean means. On Divisions of figures —restored and edited in from extant Arabic and Latin versions—deals with problems of dividing a given figure by one or more straight lines into various ratios to one another or to other given areas.

Four lost works in geometry are described in Greek sources and attributed to Euclid.Euclid's great work consisted of thirteen books covering a vast body of mathematical knowledge, spanning arithmetic, geometry and number theory.

The books are organized by subjects, covering every area of mathematics developed by the Greeks: Books I - IV, and Book VI: Plane Geometry. Euclid and His Accomplishments. Euclid's story, although well known, is also something of a timberdesignmag.com lived lots of his life in Alexandria, Egypt, and developed many mathematical timberdesignmag.com is most famous for his works in geometry, inventing many of the ways we conceive of space, time, and shapes.

Euclid was an ancient Greek mathematician from Alexandria who is best known for his major work, Elements. Although little is known about Euclid the man, he taught in a school that he founded in Alexandria, Egypt, around b.c.e. For his major study, Elements, Euclid collected the work of many.

Life. Very few original references to Euclid survive, so little is known about his life. He was likely born c. BC, although the place and circumstances of both his birth and death are unknown and may only be estimated roughly relative to other people mentioned with him.

Work, education, life style, discipline aka weld was the philosophy at Lincoln Electric for life and work. Customer appreciation was striven for as well as quality and procedural operations to better accommodate the consumer/5().

Euclid, a fast-growing technology start-up, helps brick-and-mortar retailers optimize marketing, merchandising, and operations performance by measuring foot traffic, store visits, walk-by conversion, bounce rate, visit duration, and customer timberdesignmag.com company has a network of traffic counting sensors in nearly shopping centers, malls, and street locations around the United States.

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AWS Case Study: Euclid