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Vendeur : Antiquariat Renner OHG, Albstadt, Allemagne
Membre d'association : BOEV
Date d'édition : 2023
Vendeur : True World of Books, Delhi, Inde
Livre impression à la demande
LeatherBound. Etat : New. LeatherBound edition. Condition: New. Reprinted from 1847 edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 349 Eisenstein, Ferdinand Gotthold Max, 1823-1852,Gauss, Carl Friedrich, 1777-1855.
Date d'édition : 2023
Vendeur : True World of Books, Delhi, Inde
Livre impression à la demande
LeatherBound. Etat : New. LeatherBound edition. Condition: New. Reprinted from 1847 edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 354 Ferdinand Gotthold Max Eisenstein.
Date d'édition : 2023
Vendeur : True World of Books, Delhi, Inde
Livre impression à la demande
LeatherBound. Etat : New. LeatherBound edition. Condition: New. Reprinted from 1847 edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 355 Ferdinand Gotthold Max Eisenstein.
Date d'édition : 2022
Vendeur : S N Books World, Delhi, Inde
Livre impression à la demande
LeatherBound. Etat : New. Leatherbound edition. Condition: New. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. Reprinted from 1847 edition. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. IF YOU WISH TO ORDER PARTICULAR VOLUME OR ALL THE VOLUMES YOU CAN CONTACT US. Resized as per current standards. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 358 Language: German Pages: 358.
Date d'édition : 2023
Vendeur : True World of Books, Delhi, Inde
Livre impression à la demande
LeatherBound. Etat : New. LeatherBound edition. Condition: New. Reprinted from edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 357.
Edité par Hildesheim, Georg Olms Verlagsbuchhandlung, 1967
Vendeur : Antiquariat Smock, Freiburg, Allemagne
Livre
Leinen / gebundene Ausgabe. XII, 336 S. (23 cm) Reprographischer Nachdruck der Ausgabe Berlin 1847; (Mit Frontispiz); In gutem Zustand. Sprache: Deutsch Gewicht in Gramm: 700.
Edité par MV-Naturalscience, 2020
ISBN 10 : 3968781627ISBN 13 : 9783968781624
Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, Allemagne
Livre impression à la demande
Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Weisheiten wachsen wie Bäume, dessen Wurzeln im Wissen der Vergangenheit verankert sind. Und so sind es die Bücher, welche die Errungenschaften der Menschheit beherbergen und nicht nur Geschichten, sondern Informationen aller Art bewahren. Bis heute haben schriftliche Aufzeichnungen einen hohen Stand in unserer Gesellschaft, die mittlerweile von Medien und Internet geprägt ist. Mit unserem vielfältigen Angebot möchten wir dazu beitragen, unseren historischen Wissensbestand zu erhalten und für die Gegenwart sichtbar zu machen. Besonders bedeutend erscheint daher der Erhalt der frühzeitigen Naturwissenschaften, dessen Ursprung weit in die Vergangenheit reicht und bis heute das Fundament der modernen Forschung bildet. Mit unserem vielfältigen Angebot möchten wir den Wundern der Natur auf den Grund gehen, um neue Erkenntnisse aus Altbekanntem zu schöpfen. Wir haben es uns daher zum Auftrag gemacht, die historischen Schriften im alten Stil und alter Schrift, jedoch in höchstmöglicher Qualität und praktischem Taschenbuchformat zu angenehmen Preisen aufzubereiten.Lernen Sie auch unsere anderen Verlage kennen:mv-history mv-military mv-wirtschaft mv-naturalsciencemv-medizin mv-pädagogik mv-socialscience mv-technikmv-philosophy mv-religion mv-kochen mv-literaturmv-arts mv-musik mv-travel 348 pp. Deutsch.
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ISBN 10 : 3487517930ISBN 13 : 9783487517933
Vendeur : SKULIMA Wiss. Versandbuchhandlung, Westhofen, Allemagne
Livre
Besonders aus dem Gebiete der höheren Arithmetik und der elliptischen Funktionen. Mit einer Vorrede von C. F. Gauss. Reprint der Ausgabe Berlin 1847. XII,336 Seiten, Leinen (Olms Verlag 1967). Statt EUR 49,80 600 g. Sprache: de.
Edité par Hildesheim : G. Olms,, 1967
Vendeur : Die Wortfreunde - Antiquariat Wirthwein Matthias Wirthwein, Mannheim, Allemagne
Livre
gebundene Ausgabe. Reprograf. Nachdr. d. Ausg. Berlin 1847. XII, 336 S. : 1 Titelbild ; 8 1967. Papier minimal gebräunt, sonst fast neuwertiges Exemplar. Kein Schutzumschlag. Sprache: Deutsch.
Edité par VDM Verlag Dr. Müller
ISBN 10 : 3836440520ISBN 13 : 9783836440523
Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, Allemagne
Livre impression à la demande
Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Bereits in seiner Kindheit soll Gotthold Eisenstein (1823-1852) ein außerordentliches Faible für Mathematik gehabt haben. Der Sohn eines Kaufmanns aus Danzig studierte ab 1843 Mathematik an der Berliner Universität. Bald wurde August Crelle (Begründer des `Journals für die reine und angewandte Mathematik`) auf ihn aufmerksam und machte ihn mit Alexander von Humboldt bekannt. Dieser wurde zu Eisensteins Förderer und brachte ihn u.a. mit Carl Friedrich Gauß zusammen. Gauß` Lob und Anerkennung verschaffte Eisenstein internationale Bekanntheit - im Jahre 1845 erhielt er die Ehrendoktorwürde der Universität Breslau. Zwei Jahre später habilitierte er sich an der Berliner Universität und wirkte dort als Privatdozent. Seine Lehrerfolge waren allerdings wegen einer ihm nachgesagten Schüchternheit und Hypochondrie mäßig. 1852 erkrankte Eisenstein an Tuberkulose und starb an deren Folgen im Alter von lediglich 29 Jahren.Die Arbeiten dieses Ausnahmetalents sind indessen nachhaltig in die mathematische Wissenschaft eingegangen. Nach ihm sind die `Eisensteinzahl`, die `Eisensteinreihen` und die `Eisensteinfunktionen` benannt. Zahlreiche seiner Theorien wurden von anderen Mathematikern aufgegriffen und weiterentwickelt. 352 pp. Deutsch.
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Edité par Chelsea Publishing Company, 1975
ISBN 10 : 0828402809ISBN 13 : 9780828402804
Vendeur : Moe's Books, Berkeley, CA, Etats-Unis
Livre
Hard cover. Etat : Fair. No jacket. Volume 1 only. Spine is shaken but secure. Spine and cover corners are bumped. Bottom corner of text block is scuffed. End leaves are tanned. Front free end leaf has previous owner's signature. Inside is clean and unmarked.
Vendeur : Lynge & Søn ILAB-ABF, Copenhagen, Danemark
Membre d'association : ILAB
Edition originale
Berlin, G. Reimer, 1844. 4to. As extracted from "Journal für die reine und angewandte Mathematik, 28 Band, 4. Heft, 1844". Without wrappers and backstrip. Fine and clean. [Eisenstein:] Pp. 289-374. [Entire issue: 289-380 + 2 folded plates]. First printing of German mathematics prodigy Eisenstein's paper on third degree equations with basis in a devided circle. Even though he died prematurely at the age of 29, he managed to prove biquadratic reciprocity, Quartic reciprocity, Cubic reciprocity, to be imprisoned by the Prussian army for revolutionary activities in Berlin and making Gauss state that: "There have been only three epoch-making mathematicians: Archimedes, Newton, and Eisenstein". Alexander von Humboldt, then 83, accompanied Eisenstein's remains to the cemetery. The papers presented in the present issue is among his most prominent and made him famous throughout the mathematical world. (James, Driven to innovate, P. 88). "The twenty-seventh and twenty-eighth volumes of Crelle's Journal, published in 1844, contained twenty-five contributions by Eisenstein. These testimonials to his almost unbelievable, explosively dynamic productivity rocketed him to fame throughout the mathematical world. They dealt primarily with quadratic and cubic forms, the reciprocity theorem for cubic residues, fundamental theorems for quadratic and biquadratic residues, cyclotomy and forms of the third degree, plus some notes on elliptic and Abelian transcendentals. Gauss, to whom he had sent some of his writings, praised them very highly and looked forward with pleasure to an announced visit. In June 1844, carrying a glowing letter of recommendation from Humboldt, Eisenstein went off to see Gauss. He stayed in Göttingen fourteen days. In the course of the visit he won the high respect of the "prince of mathematicians," whom he had revered all his life. The sojourn in Göttingen was important to Eisenstein for another reason: he became friends with Moritz A. Stern-the only lasting friendship he ever made. While the two were in continual correspondence on scientific matters, even Stern proved unable to dispel the melancholy that increasingly held Eisenstein in its grip. Even the sensational recognition that came to him while he was still only a third-semester student failed to brighten Eisenstein's spirits more than fleetingly. In February 1845, at the instance of Ernst E. Kummer, who was acting on a suggestion from Jacobi (possibly inspired by Humboldt), Eisenstein was awarded an honorary doctorate in philosophy by the School of Philosophy of the University of Breslau.Eisenstein soon became the subject of legend, and the early literature about him is full of errors. His treatises were written at a time when only Gauss, Cauchy, and Dirichlet had any conception of what a completely rigorous mathematical proof was. Even a man like Jacobi often admitted that his own work sometimes lacked the necessary rigor and self-evidence of methods and proofs." (DSB).
Vendeur : Lynge & Søn ILAB-ABF, Copenhagen, Danemark
Membre d'association : ILAB
Edition originale
Berlin, G. Reimer, 1844. 4to. In "Journal für die reine und angewandte Mathematik, 28 Band, 3. Heft, 1844". In the original printed wrappers, without backstrip. Last leaf with repair. Fine and clean. [Eisenstein:] Pp. 223-245" Pp. 246-247. [Entire issue: 193-288, (2), + two folded plates.] First printing of two important papers by the German mathematics prodigy Eisenstein. Even though he died prematurely at the age of 29, he managed to prove biquadratic reciprocity, Quartic reciprocity, Cubic reciprocity, to be imprisoned by the Prussian army for revolutionary activities in Berlin and making Gauss state that: "There have been only three epoch-making mathematicians: Archimedes, Newton, and Eisenstein". Alexander von Humboldt, then 83, accompanied Eisenstein's remains to the cemetery. The papers presented in the present issue is among his most prominent and made him famous throughout the mathematical world. (James, Driven to innovate, P. 88). "The twenty-seventh and twenty-eighth volumes of Crelle's Journal, published in 1844, contained twenty-five contributions by Eisenstein. These testimonials to his almost unbelievable, explosively dynamic productivity rocketed him to fame throughout the mathematical world. They dealt primarily with quadratic and cubic forms, the reciprocity theorem for cubic residues, fundamental theorems for quadratic and biquadratic residues, cyclotomy and forms of the third degree, plus some notes on elliptic and Abelian transcendentals. Gauss, to whom he had sent some of his writings, praised them very highly and looked forward with pleasure to an announced visit. In June 1844, carrying a glowing letter of recommendation from Humboldt, Eisenstein went off to see Gauss. He stayed in Göttingen fourteen days. In the course of the visit he won the high respect of the "prince of mathematicians," whom he had revered all his life. The sojourn in Göttingen was important to Eisenstein for another reason: he became friends with Moritz A. Stern-the only lasting friendship he ever made. While the two were in continual correspondence on scientific matters, even Stern proved unable to dispel the melancholy that increasingly held Eisenstein in its grip. Even the sensational recognition that came to him while he was still only a third-semester student failed to brighten Eisenstein's spirits more than fleetingly. In February 1845, at the instance of Ernst E. Kummer, who was acting on a suggestion from Jacobi (possibly inspired by Humboldt), Eisenstein was awarded an honorary doctorate in philosophy by the School of Philosophy of the University of Breslau.Eisenstein soon became the subject of legend, and the early literature about him is full of errors. His treatises were written at a time when only Gauss, Cauchy, and Dirichlet had any conception of what a completely rigorous mathematical proof was. Even a man like Jacobi often admitted that his own work sometimes lacked the necessary rigor and self-evidence of methods and proofs." (DSB).
Vendeur : Lynge & Søn ILAB-ABF, Copenhagen, Danemark
Membre d'association : ILAB
Edition originale
Berlin, G. Reimer, 1846. 4to. In "Journal für die reine und angewandte Mathematik, 33 Band, 1. Heft, 1846". In the original printed wrappers, without backstrip. Fine and clean. Last leaf with repair. [Eisenstein:] Pp. 59-70" Pp. 71-88. [Entire issue: IV, 92, (2) + 2 plates.]. First printing of two papers by Eisenstein, one of them (Beiträge zur Theorie.) being the first of his 1846-47-period where he mainly occupied himself with the theory of elliptic functions.Even though the German mathematics prodigy Eisenstein's died prematurely at the age of 29, he managed to prove biquadratic reciprocity, Quartic reciprocity, Cubic reciprocity, to be imprisoned by the Prussian army for revolutionary activities in Berlin and making Gauss state that: "There have been only three epoch-making mathematicians: Archimedes, Newton, and Eisenstein". Alexander von Humboldt, then 83, accompanied Eisenstein's remains to the cemetery. The papers presented in the present issue is among his most prominent and made him famous throughout the mathematical world. (James, Driven to innovate, P. 88). The issue also contain papers by famous contemporary mathematicians such as: C. G J. Jacobi, A. Cayley, Dirichlet and J. Steiner."Eisenstein soon became the subject of legend, and the early literature about him is full of errors. His treatises were written at a time when only Gauss, Cauchy, and Dirichlet had any conception of what a completely rigorous mathematical proof was. Even a man like Jacobi often admitted that his own work sometimes lacked the necessary rigor and self-evidence of methods and proofs." (DSB).
Vendeur : Lynge & Søn ILAB-ABF, Copenhagen, Danemark
Membre d'association : ILAB
Edition originale
Berlin, G. Reimer, 1844. 4to. In "Journal für die reine und angewandte Mathematik, 28 Band, 1 Heft, 1844". In the original printed wrappers, without backstrip. Fine and clean. [Eisenstein:] Pp. 28-35" Pp. 36-43 Pp. 44-48 Pp. 49-52" Pp. 53-67. [Entire issue: IV, 96, (2) pp. + 2 folded plates.]. First printing of six exceedingly influential papers by the German mathematics prodigy Eisenstein. Even though he died prematurely at the age of 29, he managed to prove biquadratic reciprocity, Quartic reciprocity (Presented in the present: "Lois de réciprocité"), Cubic reciprocity (Presented in the present: "Nachtrag zum cubischen Reciprocitätssatze."), to be imprisoned by the Prussian army for revolutionary activities in Berlin and making Gauss state that: "There have been only three epoch-making mathematicians: Archimedes, Newton, and Eisenstein". Alexander von Humboldt, then 83, accompanied Eisenstein's remains to the cemetery. The papers presented in the present issue is among his most prominent and made him famous throughout the mathematical world. (James, Driven to innovate, P. 88). "The twenty-seventh and twenty-eighth volumes of Crelle's Journal, published in 1844, contained twenty-five contributions by Eisenstein. These testimonials to his almost unbelievable, explosively dynamic productivity rocketed him to fame throughout the mathematical world. They dealt primarily with quadratic and cubic forms, the reciprocity theorem for cubic residues, fundamental theorems for quadratic and biquadratic residues, cyclotomy and forms of the third degree, plus some notes on elliptic and Abelian transcendentals. Gauss, to whom he had sent some of his writings, praised them very highly and looked forward with pleasure to an announced visit. In June 1844, carrying a glowing letter of recommendation from Humboldt, Eisenstein went off to see Gauss. He stayed in Göttingen fourteen days. In the course of the visit he won the high respect of the "prince of mathematicians," whom he had revered all his life. The sojourn in Göttingen was important to Eisenstein for another reason: he became friends with Moritz A. Stern-the only lasting friendship he ever made. While the two were in continual correspondence on scientific matters, even Stern proved unable to dispel the melancholy that increasingly held Eisenstein in its grip. Even the sensational recognition that came to him while he was still only a third-semester student failed to brighten Eisenstein's spirits more than fleetingly. In February 1845, at the instance of Ernst E. Kummer, who was acting on a suggestion from Jacobi (possibly inspired by Humboldt), Eisenstein was awarded an honorary doctorate in philosophy by the School of Philosophy of the University of Breslau.Eisenstein soon became the subject of legend, and the early literature about him is full of errors. His treatises were written at a time when only Gauss, Cauchy, and Dirichlet had any conception of what a completely rigorous mathematical proof was. Even a man like Jacobi often admitted that his own work sometimes lacked the necessary rigor and self-evidence of methods and proofs." (DSB).
Edité par Reimer, Berlino, 1847
Vendeur : Libreria Antonio Pettini, ROMA, RM, Italie
In-4°, IV, pp336, senza legatura, carta di tavola. Contenente le memorie più importanti dell'autore, incluso il suo" Neue Theoreme der hoher Arithmetik ", che definiva i caratteri ordinali e generici delle forme quadratiche ternarie di un determinante irregolare; e nel caso di forme definite, assegnato il peso di qualsiasi ordine o genere "(Sotheran). - Eisenstein (1823-1852), studente di Ohm e Dirichlet, ricevette un sostegno speciale da Humboldt e Gauß, attraverso i cui sforzi fu anche accettato nelle accademie di Gottinga e Berlino. La sua prova delle leggi sulla reciprocità cubica e biquadratica (la ragione per la quale Gauss descrisse come un "mysterium maxime reconditum") e il suo lavoro sul decadimento quadratico dei numeri primi lo fecero conoscere in un sol colpo. DSB 4, 340; Sotheran 7479; Merzbach 1847b (Gauss).In-4 °, IV, pp336, without binding, table leaf. Containing the author's most important memoirs, including his "Neue Theoreme der hoher Arithmetik", which defined the ordinal and generic characters of the quadratic ternary forms of an irregular determinant; and in the case of definite forms, given the weight of any order or gender "(Sotheran). - Eisenstein (1823-1852), student of Ohm and Dirichlet, received special support from Humboldt and Gauß, through whose efforts he was also accepted in the academies of Göttingen and Berlin. His evidence of the laws on cubic and biquadratic reciprocity (the reason why Gauss described it as a "mysterium maxime reconditum") and his work on the quadratic decay of prime numbers made him well known .DSB 4, 340; Sotheran 7479; Merzbach 1847b (Gauss).
Vendeur : Lynge & Søn ILAB-ABF, Copenhagen, Danemark
Membre d'association : ILAB
Edition originale
Berlin, G. Reimer, 1844. 4to. In contemporary half cloth. In "Journal für die reine und angewandte Mathematik", 27. band, Heft 1-4, 1844. Entire volume 27 offered. A small library stamp to lower part of p. 1 and a white label pasted on to upper part of spine. Light occassional brownspotting, otherwise fine and clean. First printing of these influential papers by the German mathematics prodigy Eisenstein. Even though he died prematurely at the age of 29, he managed to prove Cubic reciprocity (presented in the present papers) biquadratic reciprocity, Quartic reciprocity, to be imprisoned by the Prussian army for revolutionary activities in Berlin and making Gauss state that: "There have been only three epoch-making mathematicians: Archimedes, Newton, and Eisenstein". Alexander von Humboldt, then 83, accompanied Eisenstein's remains to the cemetery. The papers presented in the present issue is among his most prominent and made him famous throughout the mathematical world. (James, Driven to innovate, P. 88). "The twenty-seventh (the present and most extensive) and twenty-eighth volumes of Crelle's Journal, published in 1844, contained twenty-five contributions by Eisenstein. These testimonials to his almost unbelievable, explosively dynamic productivity rocketed him to fame throughout the mathematical world. They dealt primarily with quadratic and cubic forms, the reciprocity theorem for cubic residues, fundamental theorems for quadratic and biquadratic residues, cyclotomy and forms of the third degree, plus some notes on elliptic and Abelian transcendentals. Gauss, to whom he had sent some of his writings, praised them very highly and looked forward with pleasure to an announced visit. In June 1844, carrying a glowing letter of recommendation from Humboldt, Eisenstein went off to see Gauss. He stayed in Göttingen fourteen days. In the course of the visit he won the high respect of the "prince of mathematicians," whom he had revered all his life. The sojourn in Göttingen was important to Eisenstein for another reason: he became friends with Moritz A. Stern-the only lasting friendship he ever made. While the two were in continual correspondence on scientific matters, even Stern proved unable to dispel the melancholy that increasingly held Eisenstein in its grip. Even the sensational recognition that came to him while he was still only a third-semester student failed to brighten Eisenstein's spirits more than fleetingly. In February 1845, at the instance of Ernst E. Kummer, who was acting on a suggestion from Jacobi (possibly inspired by Humboldt), Eisenstein was awarded an honorary doctorate in philosophy by the School of Philosophy of the University of Breslau.Eisenstein soon became the subject of legend, and the early literature about him is full of errors. His treatises were written at a time when only Gauss, Cauchy, and Dirichlet had any conception of what a completely rigorous mathematical proof was. Even a man like Jacobi often admitted that his own work sometimes lacked the necessary rigor and self-evidence of methods and proofs." (DSB).