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This is the first full-scale biography of Leonhard Euler (1707–83), one of the greatest mathematicians and theoretical physicists of all time. In this comprehensive and authoritative account, Ronald Calinger connects the story of Euler's eventful life to the astonishing achievements that place him in the company of Archimedes, Newton, and Gauss. Drawing chiefly on Euler’s massive published works and correspondence, which fill more than eighty volumes so far, this biography sets Euler’s work in its multilayered context―personal, intellectual, institutional, political, cultural, religious, and social. It is a story of nearly incessant accomplishment, from Euler’s fundamental contributions to almost every area of pure and applied mathematics―especially calculus, number theory, notation, optics, and celestial, rational, and fluid mechanics―to his advancements in shipbuilding, telescopes, ballistics, cartography, chronology, and music theory.The narrative takes the reader from Euler’s childhood and education in Basel through his first period in St. Petersburg, 1727–41, where he gained a European reputation by solving the Basel problem and systematically developing analytical mechanics. Invited to Berlin by Frederick II, Euler published his famous Introductio in analysin infinitorum, devised continuum mechanics, and proposed a pulse theory of light. Returning to St. Petersburg in 1766, he created the analytical calculus of variations, developed the most precise lunar theory of the time that supported Newton’s dynamics, and published the best-selling Letters to a German Princess―all despite eye problems that ended in near-total blindness. In telling the remarkable story of Euler and how his achievements brought pan-European distinction to the Petersburg and Berlin academies of sciences, the book also demonstrates with new depth and detail the central role of mathematics in the Enlightenment.

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Looking for a stylish and practical armchair to add sophistication to your living space. Look no further. Our armchair boasts a classic design that radiates timeless charm, making it a much-loved addition to any room. The chair's sturdy frame is crafted from a blend of solid and manufactured wood, ensuring durability and longevity, while the sinuous S-springs and spring pocket provide excellent support to prevent sagging over prolonged use. The chair's unique Englished arms and wingback design offer a comfortable and supportive place to relax and unwind, whether you're watching TV or enjoying the ocean breeze. The chair's foam is covered in a beautiful patterned jacquard fabric, which adds to its overall charm and appeal. With its handsome design and durable construction, our armchair is the perfect combination of style and practicality, making it an ideal addition to any home. Don't miss out on this opportunity to elevate your decor and add a touch of sophistication to your space.

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Introducing our stunning armchair set, the perfect addition to any stylish and sophisticated living space. Crafted from a combination of solid and manufactured wood, our chair set boasts sturdy brown hardwood legs that provide excellent support for years to come. The sinuous S-springs and spring pocket ensure maximum comfort and prevent sagging, ensuring you can relax and unwind in ultimate comfort. The unique Englished arms and wingback design of the back provide extra support, while the patterned jacquard fabric adds a touch of elegance to any room. With its timeless charm and durable construction, our classic armchair set is the perfect combination of style and practicality. Enjoy watching TV or soaking up the ocean breeze in the utmost comfort and sophistication with our stunning armchair set. Color: BEIGE.

Whether you need it to round out your living room look or accent the master suite, this transitional power recliner is the perfect spot to unwind. Accommodating to adults and seniors, it's wrapped in skin-friendly genuine leather to give you a luxurious treat. The foam cushions with sinuous spring packs inside provide you with just the right amount of comfort. The unique design comes with elegantly profiled arms that provide more resting space. The nailhead trims design with graceful cutaway arms for more space to lounge brings a sophisticated vintage feel. The nursery chair has two USB ports and can provide a place for charging various appliances. When you feel tired, just press the switch to recline and you can choose your comfortable angle to rest for the ultimate recliner experience. Blending style and function, this power recliner can both swivel and rock which is the perfect choice to decorate your living space. Color: Black.

Whether you need it to round out your living room look or accent the master suite, this transitional power recliner is the perfect spot to unwind. Accommodating to adults and seniors, it's wrapped in skin-friendly genuine leather to give you a luxurious treat. The foam cushions with sinuous spring packs inside provide you with just the right amount of comfort. The unique design comes with elegantly profiled arms that provide more resting space. The nailhead trims design with graceful cutaway arms for more space to lounge brings a sophisticated vintage feel. The nursery chair has two USB ports and can provide a place for charging various appliances. When you feel tired, just press the switch to recline and you can choose your comfortable angle to rest for the ultimate recliner experience. Blending style and function, this power recliner can both swivel and rock which is the perfect choice to decorate your living space. Color: Camel.

Whether you need it to round out your living room look or accent the master suite, this transitional power recliner is the perfect spot to unwind. Accommodating to adults and seniors, it's wrapped in skin-friendly genuine leather to give you a luxurious treat. The foam cushions with sinuous spring packs inside provide you with just the right amount of comfort. The unique design comes with elegantly profiled arms that provide more resting space. The nailhead trims design with graceful cutaway arms for more space to lounge brings a sophisticated vintage feel. The nursery chair has two USB ports and can provide a place for charging various appliances. When you feel tired, just press the switch to recline and you can choose your comfortable angle to rest for the ultimate recliner experience. Blending style and function, this power recliner can both swivel and rock which is the perfect choice to decorate your living space. Color: Brown.

Whether you need it to round out your living room look or accent the master suite, this transitional power recliner set is the perfect spot to unwind. Accommodating to adults and seniors, it's wrapped in skin-friendly genuine leather to give you a luxurious treat. The foam cushions with sinuous spring packs inside provide you with just the right amount of comfort. The unique design comes with elegantly profiled arms that provide more resting space. The nailhead trims design with graceful cutaway arms for more space to lounge brings a sophisticated vintage feel. The nursery chair set has two USB ports and can provide a place for charging various appliances. When you feel tired, just press the switch to recline and you can choose your comfortable angle to rest for the ultimate recliner experience. Blending style and function, this power recliner set can both swivel and rock which is the perfect choice to decorate your living space. Color: Brown.

Whether you need it to round out your living room look or accent the master suite, this transitional power recliner set is the perfect spot to unwind. Accommodating to adults and seniors, it's wrapped in skin-friendly genuine leather to give you a luxurious treat. The foam cushions with sinuous spring packs inside provide you with just the right amount of comfort. The unique design comes with elegantly profiled arms that provide more resting space. The nailhead trims design with graceful cutaway arms for more space to lounge brings a sophisticated vintage feel. The nursery chair set has two USB ports and can provide a place for charging various appliances. When you feel tired, just press the switch to recline and you can choose your comfortable angle to rest for the ultimate recliner experience. Blending style and function, this power recliner set can both swivel and rock which is the perfect choice to decorate your living space. Color: Black.

Rare Leonhard tube console from the 1960s. Built by engineers responsible for the EMT 140 plate reverb. It is not easy to find a tube console made ...

This is the first full-scale biography of Leonhard Euler (1707–83), one of the greatest mathematicians and theoretical physicists of all time. In this comprehensive and authoritative account, Ronald Calinger connects the story of Euler's eventful life to the astonishing achievements that place him in the company of Archimedes, Newton, and Gauss. Drawing chiefly on Euler’s massive published works and correspondence, which fill more than eighty volumes so far, this biography sets Euler’s work in its multilayered context―personal, intellectual, institutional, political, cultural, religious, and social. It is a story of nearly incessant accomplishment, from Euler’s fundamental contributions to almost every area of pure and applied mathematics―especially calculus, number theory, notation, optics, and celestial, rational, and fluid mechanics―to his advancements in shipbuilding, telescopes, ballistics, cartography, chronology, and music theory.The narrative takes the reader from Euler’s childhood and education in Basel through his first period in St. Petersburg, 1727–41, where he gained a European reputation by solving the Basel problem and systematically developing analytical mechanics. Invited to Berlin by Frederick II, Euler published his famous Introductio in analysin infinitorum, devised continuum mechanics, and proposed a pulse theory of light. Returning to St. Petersburg in 1766, he created the analytical calculus of variations, developed the most precise lunar theory of the time that supported Newton’s dynamics, and published the best-selling Letters to a German Princess―all despite eye problems that ended in near-total blindness. In telling the remarkable story of Euler and how his achievements brought pan-European distinction to the Petersburg and Berlin academies of sciences, the book also demonstrates with new depth and detail the central role of mathematics in the Enlightenment.

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An acclaimed biography of the Enlightenment's greatest mathematicianThis is the first full-scale biography of Leonhard Euler (1707–1783), one of the greatest mathematicians and theoretical physicists of all time. In this comprehensive and authoritative account, Ronald Calinger connects the story of Euler's eventful life to the astonishing achievements that place him in the company of Archimedes, Newton, and Gauss. Drawing on Euler's massive published works and correspondence, this biography sets Euler's work in its multilayered context―personal, intellectual, institutional, political, cultural, religious, and social. It is a story of nearly incessant accomplishment, from Euler's fundamental contributions to almost every area of pure and applied mathematics in his time―especially calculus, mechanics, and optics―to his advances in shipbuilding, telescopes, acoustics, ballistics, cartography, chronology, and music theory.

An acclaimed biography of the Enlightenment's greatest mathematicianThis is the first full-scale biography of Leonhard Euler (1707–1783), one of the greatest mathematicians and theoretical physicists of all time. In this comprehensive and authoritative account, Ronald Calinger connects the story of Euler's eventful life to the astonishing achievements that place him in the company of Archimedes, Newton, and Gauss. Drawing on Euler's massive published works and correspondence, this biography sets Euler's work in its multilayered context―personal, intellectual, institutional, political, cultural, religious, and social. It is a story of nearly incessant accomplishment, from Euler's fundamental contributions to almost every area of pure and applied mathematics in his time―especially calculus, mechanics, and optics―to his advances in shipbuilding, telescopes, acoustics, ballistics, cartography, chronology, and music theory.

Describes Euler's early mathematical works - the 50 mathematical articles he wrote before he left St. Petersburg in 1741 to join the Academy of Frederick the Great in Berlin. These works contain some of Euler's greatest mathematics: the Konigsburg bridge problem, his solution to the Basel problem, his first proof of the Euler-Fermat theorem. Also presented are important results that we seldom realize are due to Euler: that mixed partial derivatives are equal, our f(x) notation, and the integrating factor in differential equations. The book is a portrait of the world's most exciting mathematics between 1725 and 1741, rich in technical detail, woven with connections within Euler's work and with the work of other mathematicians in other times and places, laced with historical context.

XCIII, 285 S., mit 1 s/w-Abb. Neuwertiges Ex. / Fine Copy // In dem 1796 erschienenen ersten Teil seiner Auswahl vermischter Schriften hat Reinhold neun Aufsätze aus seiner kantischen Phase in überarbeiteter Form neu publiziert. Drei Aufsätze dokumentieren seine auf die Jahre 1788/89 zurückgehenden Reflexionen philosophisch-ästhetischen Inhalts. Reinhold spricht dies unter anderem mit Blick auf Wielands Oberon über die Notwendigkeit einer Verstand und Sinnlichkeit vermittelnden Geschmacksbildung und entfaltet eine als kantisch verstandene Theorie des Vergnügens, die bei Friedrich Schiller Anklang fand, bei Kant hingegen offenbar auf einige Skepsis stieß. Ein Aufsatz von 1791 ist methodischen Überlegungen zur Geschichte der Philosophie gewidmet. Damit leistet Reinhold einen paradigmatischen Beitrag zu der in der Epoche des Deutschen Idealismus dominant werdenden philosophischen Geschichtsschreibung. In zwei Aufsätzen von 1795 und 1796 über die Frage des Primats der praktischen Vernunft argumentiert Reinhold dafür, dass nur ausgehend vom Begriff der Willensfreiheit ein zureichendes Verständnis von Moral und Religion erschlossen werden kann. Drei weitere Aufsätze aus den Jahren 1791 bis 1794 handeln von zeitgeschichtlichen Themen. Reinhold moniert sozialpolitische Fehlentwicklungen im revolutionären Frankreich, weist dabei aber auch konservative Gegner der Revolution wie Rehberg und Gentz in die Schranken. Er diskutiert mit einer gewissen Ironie die mit der antiklerikalen Politik in Frankreich neu entbrannte Frage des Zölibats und kritisiert aus der Sicht eines aufgeklärten Moral- und Rechtsbewusstseins das damals in studentischen Kreisen stark verbreitete Duellwesen. Der Band enthält die Varianten zu den verschiedenen Fassungen der Aufsätze, eine Einleitung sowie einen ausführlichen Kommentar. ISBN: 9783796534416 Sprache: Deutsch Gewicht in Gramm: 836

Describes Euler's early mathematical works - the 50 mathematical articles he wrote before he left St. Petersburg in 1741 to join the Academy of Frederick the Great in Berlin. These works contain some of Euler's greatest mathematics: the Konigsburg bridge problem, his solution to the Basel problem, his first proof of the Euler-Fermat theorem. Also presented are important results that we seldom realize are due to Euler: that mixed partial derivatives are equal, our f(x) notation, and the integrating factor in differential equations. The book is a portrait of the world's most exciting mathematics between 1725 and 1741, rich in technical detail, woven with connections within Euler's work and with the work of other mathematicians in other times and places, laced with historical context.

Leonard and Mary Friedrich and the small Quaker group in Bad Pyrmont helped Jews to escape before the war, and supported hundreds of persecuted people during the eleven years of Nazi rule. Their resistance to the Nazis eventually provoked the authorities to arrest Leonhard in May 1942.The Quakerhouse was commandeered. Mary, who was English by birth, was alone when she was subjected to innumerable Gestapo interrogations and house searches.Leonhard and Mary both survived the war and rebuilt Quaker work in Bad Pyrmont. The book provides a personal account of the development of Quakerism in Germany.

This is the first translation into English of a work of late German enlightenment by Karl Leonhard Reinhold (1757-1823). Reinhold was an acute thinker, who is best known for his interpretations of Kant and whose writings on theoretical philosophy were decisive for the development of philosophy after Kant. This work is not a "philosophical" one in the strict sense but was written for a general audience by a philosopher concerned with public enlightenment. The book, published in 1798, is based on the principle of "common sense," a popular concept at the time as German enlightenment was nearing its end. Roehr's extensive historical-analytical work provides the context necessary for fully appreciating Reinhold's work. She does not restrict her discussion to the immediate time of Reinhold, but details the thinking of the German enlightenment in general. She analyzes the moral, religious, political, and philosophical elements of the period, as well as the history of their development. In the course of her introduction, she illustrates that the Kantian concept of enlightenment was in no way the only one or even the most influential one at the time Reinhold wrote. Philosophers, political theorists, historians, theologians, and eighteenth-century scholars in general will gain much insight from this valuable study and the accompanying translation.