Henrik Kragh Sørensen (1973-)

Steno Institute, Aarhus

Niels Henrik Abel (1802-29)

K_{3,3} \geq 2

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Henrik Kragh's lectures and seminars

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History of science in Scandinavia

2010/11/18Mathematics Denationalized: Scandinavian Mathematical Congresses, 1909-1925@ ESHS-4: Circulation of Science and Technology (Barcelona, ES) November 18 to 20, 2010
2009/11/10Scandinavian Mathematics Between Modernity and Applications: Applied Mathematics at Mathematical Congresses, 1900--1925@ Second Annual Conference for the History of Science in Norway (Tromsø, NO) November 10 to 12, 2009
2009/10/12Scandinavian Mathematics Between Modernity and Applications: Applied Mathematics at Mathematical Congresses, 1900--1925@ Between Modernism and Application: Comparative Studies in the History of Early 20th Century Mathematics (Frankfurt, DE) October 12 to 15, 2009
2008/07/04Meeting under the integral sign: Politics and mathematics at the 1936 ICM in Oslo@ Sixth Joint Meeting of the BSHS, CSHPS, and HSS (Oxford, UK) July 4 to 6, 2008
2008/05/20Meeting under the integral sign: Politics and mathematics at the 1936 International Congress of Mathematicians in Oslo@ First Annual Conference for the History of Science in Norway (Oslo, NO) May 20 to 22, 2008
2008/02/01Søde piger og matematik --- eller ``Der er intet forlystende ved matematik'': Danske satiriske fremstillinger af matematik@ Første Fredag i Februar: Matematikdag (Frederiksberg Seminarium, København, DK) February 1, 2008
2007/11/01Meeting under the integral sign: Politics and mathematics at the 1936 ICM in Oslo@ 18th Novembertagung (Bonn, DE) November 1 to 4, 2007
2007/05/25The International Congress of Mathematicians in Oslo 1936 and problems of international communication@ Internationalization of mathematics in the first part of the 20th century (Kristiansand, NO) May 25, 2007
2007/02/21``Der er intet forlystende ved matematik'' --- eller er der? Danske satiriske fremstillinger af matematik@ Foreningen Cirklen (Århus, DK) February 21, 2007
2006/04/18Fra Naturvidenskabens Danmarkshistorie - særligt om Matematik i Danmark 1800-1950@ Colloquium (IMADA, SDU, Odense, DK) April 18, 2006
2005/05/09The Abel Legacy, the Abel Centennial, and the shaping of Norwegian mathematics around 1900@ Science in Scandinavia around 1900 (Kristiansand, NO) May 9 to 11, 2005
2005/02/10De matematiske videnskaber i Danmark, 1850-1970@ History of science in Denmark (History of Science Department, Århus, DK) February 10, 2005
2004/11/25Professionalization of mathematics in Scandinavia: Mathematicians using the history of mathematics@ 15th Novembertagung (Utrecht, NL) November 25 to 28, 2004
2004/11/15The professionalisation of Danish and Norwegian mathematical research around 1900@ Colloquium (Agder University College, Kristiansand, NO) November 15, 2004
2004/11/04The use of historiography in the formation of Scandinavian mathematics@ Science in Europe --- Europe in Science (1st ESHS conference) (Maastricht, NL) November 4 to 6, 2004
2004/09/30Forskningstraditioner og -kontakter i skandinavisk matematik ca. 1900@ Colloquium (History of Science Department, Århus, DK) September 30, 2004
2004/07/09Formation of regional research traditions in mathematics in Scandinavia: communities and communication@ 3rd joint meeting of the BSHM and the CSHPM (Cambridge, UK) July 9 to 11, 2004
2004/06/02Formation of regional research traditions in mathematics in Scandinavia: national historiographies@ 4th STEP Meeting (Science and Technology in the European Periphery) (Sandbjerg, DK) June 2 to 6, 2004
2003/05/14Mathematics in Denmark: Actor Groups, Objectives, and Means@ Mathematics 1850--1920 --- Modernity and Professionalisation (Aarhus, DK) May 14, 2003
2002/11/22Iscenesættelse af et fags fremgang: Dansk matematik i 1800-tallet@ IUHPS Annual meeting (Århus, DK) November 22, 2002

Abel's mathematics

2010/12/16The use of history of mathematics among Scandinavian mathematicians, 1870--1950@ History of History of Mathematics (Oxford, UK) December 16 to 17, 2010
2010/11/10@ Dansk Forskning i Matematikkens History og Filosofi IX (Holbæk, DK) November 10 to 11, 2010
2010/11/04@ Mathematics colloquium (Department of Mathematics, Mainz, DE) November 4, 2010
2010/11/03@ Hansteen Symposium (Oslo, NO) November 3, 2010
2010/11/03@ 21st Novembertagung (Mainz, DE) November 3 to 7, 2010
2010/04/15Den Romantiske Matematiks Ironi: Helte, Ligninger og Begrebs-Centreret Matematik@ IMFUFA seminar (IMFUFA, RUC, Roskilde, DK) April 15, 2010
2010/02/26The use of history of mathematics among Scandinavian mathematicians, 1870-1950@ Fagligt farvel-arrangement for Kirsti Andersen (Århus, DK) February 26, 2010
2010/02/25Gennem kaninhullet: Hvordan matematikken blev mærkelig i det 19. århundrede@ Talentundervisning i matematik (Favrskov Gymnasium, Hadsten, DK) February 25, 2010
2009/11/02Algebra and Analysis as Styles in Abel's Mathematics@ Dansk Forskning i Matematikkens History og Filosofi VIII (Holbæk, DK) November 2 to 3, 2009
2009/10/26Abel og Den Romantiske Matematiks Ironi: Helte, Ligninger og Begrebs-Centreret Matematik@ Hansteen Symposium (Oslo, NO) October 26, 2009
2009/09/24For hele Norges skyld: Et causeri om Abel og Darwin@ Abelseminaret 2009 (Gjerstad, NO) September 24 to 26, 2009
2009/09/08Abelske grupper: Hvori består det \emph{Abelske} ved \emph{abelske grupper}?@ Eulers venner (Århus, DK) September 8, 2009
2009/07/28``Throwing some light on the vast darkness that is Analysis'': Niels Henrik Abel's contributions to the re-orientation of analysis in the 1820s@ XXIII International Congress of History of Science and Technology (Budapest, HU) July 28 to August 2, 2009
2009/03/10Den Romantiske Matematiks Ironi: Helte, Ligninger og Begrebs-Centreret Matematik@ Aspects of the history and philosophy of mathematics (Department of Science Studies, Århus, DK) March 10, 2009
2008/11/28Matematik+Romantik=Ironi: Verdener skabt ud af intet@ Romanticism and Science (Emdrup, DK) November 28, 2008
2008/11/05Romantic Equations and the Rise of Concept-Centred Mathematics@ 19th Novembertagung (Holbæk, DK) November 5 to 9, 2008
2008/10/23Romantic Equations and the Rise of Concept-Centred Mathematics@ Weekly Math Seminar (Newcastle University, Newcastle, AU) October 23, 2008
2008/10/17Romantic Equations and the Rise of Concept-Centred Mathematics@ Joint Mathematics Colloquium (Sydney University and University of New South Wales, Sydney, AU) October 17, 2008
2008/03/06Romantic Equations: The Fundamental Theorem of Algebra and the Solution of Polynomial Equations in the Nineteenth Century@ Aspects of the history and philosophy of mathematics (Department of Science Studies, Århus, DK) March 6, 2008
2007/11/26Wittgenstein, Abel og funktionsbegrebet@ Dansk Forskning i Matematikkens History og Filosofi VI (Holbæk, DK) November 26 to 27, 2007
2007/08/09Functions as formulae and/or concepts in the early nineteenth century@ 13th International Congress of Logic, Methodology and Philosophy of Science (Beijing, CN) August 9 to 15, 2007
2007/03/26Representations as means and ends: Representations in mathematical analysis during the first part of the nineteenth century@ PMP2007: Perspectives on Mathematical Practices (Brussels, BE) March 26 to 28, 2007
2006/11/03Getting to know each other: The role of habituation in analysis during the early nineteenth century@ 17th Novembertagung (Edinburgh, UK) November 3 to 5, 2006
2006/03/09Genus-begrebet fra Abel til Riemann: Rekontekstualisering i matematikken@ Dansk Forskning i Matematikkens Historie og Filosofi V (Holbæk, DK) March 9 to 10, 2006
2005/11/04On fluid, yet fundamental, concepts in Abel's mathematics@ 16th Novembertagung (Paris, FR) November 4 to 6, 2005
2005/01/13Abels værk mellem formel- og begrebs-centreret matematik@ Colloquium (IMADA, SDU, Odense, DK) January 13, 2005
2004/11/24Fra ligningsteori til gruppeteori: Abel og Galois@ Thirteen episodes from the history of mathematics (History of Science Department, Århus, DK) November 24, 2004
2004/10/31Habituation and representation of elliptic functions in Abel's mathematics@ History of Differential Equations, 1670--1950 (Oberwolfach, DE) October 31 to November 6, 2004
2004/08/10Form vs. begreb: Abel og Galois om `uløselige' ligninger@ DMF Summer School (Århus, DK) August 10, 2004
2004/05/12Understanding Abel's mathematics in a framework of formula-centred and concept-centred mathematics@ Exploring the History of Mathematics: How do we know what questions to ask? (Richmond, Virginia, US) May 12 to 15, 2004
2004/02/26Further towards a framework for interpreting Abel's mathematics@ GWAD (Utrecht, NL) February 26, 2004
2003/11/24Patologiske eksemplers betydning for funktionsbegrebets udvikling@ Course for Faroese teachers of mathematics (Vágar, FO) November 24, 2003
2003/11/14Towards a framework for interpreting Abel's mathematics@ GWAD (Utrecht, NL) November 14, 2003
2003/11/13What's \emph{Abelian} about \emph{abelian} groups?@ Staff colloquium (Department of Mathematics, Utrecht, NL) November 13, 2003
2003/10/17Niels Henrik Abel (1802-1829) and the Emergence of Concept-Centred Mathematics@ 2nd International History and Philosophy of Mathematics Meeting (Seville, ES) October 17 to 19, 2003
2003/05/01Formula-Centred and Concept-Centred Mathematics in the Early 19th Century@ 1st Nordic post-graduate workshop in the History of Science and Technology (Bjerringbro, DK) May 1 to 4, 2003
2002/12/02Abel and the early 19th century change in the basic objects of mathematics@ PHIS Graduate Conference 2002 (Odense, DK) December 2 to 3, 2002
2002/11/12Patologiske eksemplers betydning for funktionsbegrebets udvikling@ LMFK course for teachers of mathematics (Slagelse, DK) November 12, 2002
2002/10/25Midt i en matematisk brydningstid --- Niels Henrik Abel og hans matematik@ LMFK Annual meeting (Århus, DK) October 25, 2002
2002/05/03Abel's mathematics in the context of traditions and changes@ PhD defence (Århus, DK) May 3, 2002
2002/04/12Hvad har svære ligninger, uendelige rækker og ellipser med fodbold og langrend at gøre?@ IVH Presentation for students (History of Science Department, Århus, DK) April 12, 2002
2002/04/11Algebraisk ligningsløsning fra Lagrange til Galois@ Thirteen episodes from the history of mathematics (History of Science Department, Århus, DK) April 11, 2002
2002/04/05Niels Henrik Abel - matematik under brydning@ Abel mini-symposium (Kristiansand, NO) April 5, 2002
2001/12/19``Abel den Lykkelige'' --- juleforelæsning i Aspekter@ Aspects of the history and philosophy of mathematics (History of Science Department, Århus, DK) December 19, 2001
2001/11/29``Abel den Lykkelige'': Temaer fra den matematiske brydningstid i 1820'erne@ Colloquium (Department of Mathematics, Aalborg, DK) November 29, 2001
2001/11/03``Abel den lykkelige''@ IVH Alumni meeting (History of Science Department, Århus, DK) November 3, 2001
2001/08/31Fra algebraisk ligningsløsning til abstrakt gruppeteori@ DMF Summer School (Sandbjerg, DK) August 31, 2001
2001/05/10Abels Pariserafhandling og dens placering i den matematiske brydningstid@ Colloquium (History of Science Department, Århus, DK) May 10, 2001
2001/04/24Abels Pariserafhandling og dens placering i den matematiske brydningstid@ Colloquium (Society for the history of science, København, DK) April 24, 2001
2000/11/12Aspekter af den matematiske brydningstid i begyndelsen af 1800-tallet@ Dansk forskning i Matematikkens Historie og Filosofi III (Holbæk, DK) November 12 to 13, 2000
2000/05/24Early 19th century rigor in analysis. The theory of infinite series as seen by N. H. Abel@ Colloquium (Palermo, IT) May 24, 2000
2000/05/07N. H. Abel on elliptic functions. Problems of division and reduction@ Colloquium (Palermo, IT) May 7, 2000
2000/05/03I mesterlære som matematiker for 200 år siden. Niels Henrik Abel og hans matematik@ Eulers venner (Århus, DK) May 3, 2000
1999/12/14N. H. Abel og hans matematik@ Aspects of the history and philosophy of mathematics (History of Science Department, Århus, DK) December 14, 1999
1999/12/08Matematisk brydningstid og Niels Henrik Abels matematik@ Qualifying examination (History of Science Department, Århus, DK) December 8, 1999
1999/03/12Niels Henrik Abel's matematik@ Dansk forskning i Matematikkens Historie og Filosofi II (Holbæk, DK) March 12 to 13, 1999
1998/12/11Cauchy og Abel@ Aspects of the history and philosophy of mathematics (History of Science Department, Århus, DK) December 11, 1998
1998/11/25Style and rigor in Niels Henrik Abel's mathematics@ Colloquium (Department of Mathematics, Utrecht, NL) November 25, 1998
1998/10/30Theorems with exceptions and the use of proof@ 9th Novembertagung in the History of Mathematics (Nijmegen, NL) October 30 to November 1, 1998
1997/04/01Patologiske funktioner og modeksemplets metode (med Bjarne Aagaard)@ History of analysis (History of Science Department, Århus, DK) April 1, 1997
1994/11/01Abels udledning af binomialsætningen@ History of infinite series (History of Science Department, Århus, DK) November 1, 1994

Mathematics and culture

2010/06/12Aspekter af Cantors og Gödels tænkning om matematikkens begrænsninger og religion@ Symposium: Forum Teologi Naturvidenskab (Århus, DK) June 12, 2010
2010/04/20Matematikken og verden: Det gyldne snit og matematikkens anvendelighed@ Besøgsservice: 1.g-matematikklasse fra Struer (Aarhus Universitet, Århus, DK) April 20, 2010
2010/02/08Træk af matematikkens historie med et særligt øje for samspillet mellem matematik og tro@ Forum Teologi og Naturvidenskab (Aarhus Universitet, Århus, DK) February 8, 2010
2006/09/11The Beauty of Mathematics@ Besøgsservice (Århus Statsgymnasium, Århus, DK) September 11, 2006
2001/09/27Matematik og sprog (workshop)@ Besøgsservice (Odder Gymnasium, Odder, DK) September 27, 2001

History of mathematics

2006/11/21Fra matematiseret virkelighedsbeskrivelse til abstrakt geometri@ Besøgsservice (Sønderborg gymnasium, Århus, DK) November 21, 2006
2006/03/20Ligningsløsning og komplekse tal fra Babel til Abel@ Besøgsservice (Aarhus Katedralskole, Århus, DK) March 20, 2006
2006/03/07Ligningsløsning fra Babel til Abel@ Besøgsservice (Risskov Amtsgymnasium, Århus, DK) March 7, 2006
2003/03/08Temaer fra kryptologiens historie@ Masteruddannelsen i kryptologi (Århus, DK) March 8, 2003
2003/02/19Ligningers løsningsformler fra Babel til Abel: Hvad er matematik?@ Besøgsservice (Skanderborg, Århus, DK) February 19, 2003
2003/02/17Matematikken i begyndelsen af 1800-tallet@ Besøgsservice (Århus, DK) February 17, 2003
2003/02/06Ligningers løsningsformler fra Babel til Abel: Hvad er matematik?@ Besøgsservice (Risskov Amtsgymnasium, Århus, DK) February 6, 2003
2002/05/13Ligningers løsningsformler fra Babel til Abel@ Besøgsservice (Marselisborg Gymnasium, Århus, DK) May 13, 2002
2001/09/18Ligningers løsningsformler fra Babel til Abel@ Besøgsservice (Marselisborg Gymnasium, Århus, DK) September 18, 2001
2001/09/14Ligningers løsningsformler fra Babel til Abel@ Besøgsservice (VUC Roskilde, Roskilde, DK) September 14, 2001
2001/09/12Ligningsløsningens sprog@ Besøgsservice (Århus Statsgymnasium, Århus, DK) September 12, 2001
2001/05/08Ligningers løsningsformler fra Babel til Abel@ Besøgsservice (Risskov Amtsgymnasium, Århus, DK) May 8, 2001
2001/03/15Ligningers løsningsformler fra Babel til Abel@ Besøgsservice (Risskov Amtsgymnasium, Århus, DK) March 15, 2001
2001/03/01Ligningers løsningsformler fra Babel til Abel@ Besøgsservice (Risskov Amtsgymnasium, Århus, DK) March 1, 2001
1998/09/29Algebraisk løsning af ligninger i historisk lys@ Besøgsservice (Århus Statsgymnasium, Århus, DK) September 29, 1998

Philosophy of science

2010/09/21Matematikkens metode(r): Vedkommende videnskabsteori i gymnasiets matematikundervisning@ Konference om udviklingsprojekt i matematikkens videnskabsteori (Matematiklærerforeningen, Odense, DK) September 21, 2010
2010/09/14Matematikkens metode(r): Vedkommende videnskabsteori i gymnasiets matematikundervisning@ Konference om udviklingsprojekt i matematikkens videnskabsteori (Matematiklærerforeningen, Aalborg, DK) September 14, 2010
2010/09/09Matematikkens metode(r): Vedkommende videnskabsteori i gymnasiets matematikundervisning@ Fagligt-pædagogisk kursus i matematik (Vejle, DK) September 9, 2010
2010/08/12@ Workshop on Explanations in Mathematics (Aarhus, DK) August 12 to 13, 2010
2010/06/21Experimental mathematics and the notion of proof@ From Practice to Results in Logic and Mathematics (Nancy, FR) June 21 to 23, 2010
2010/05/10Matematikkens metode(r): Vedkommende videnskabsteori i gymnasiets matematikundervisning@ Halvdagskursus om matematikkens metoder (Århus Katedralskole, Århus, DK) May 10, 2010
2010/04/19Experimental mathematics in the 1990s: The second loss of certainty?@ Research group meeting (IVS, AU, Århus, DK) April 19, 2010
2010/04/08Experimental mathematics in the 1990s: The second loss of certainty?@ IMF seminar (IMF, AU, Århus, DK) April 8, 2010
2010/03/11Are proofs mathematical experiments? Are mathematical experiments proofs?@ Thought Experiments and Computer Simulations: Same End, Different Means? (Paris, FR) March 11 to 13, 2010
2010/02/28Experimental mathematics in the 1990s: A second loss of certainty?@ Disciplines and Styles in Pure Mathematics, 1800-2000 (Oberwolfach, DE) February 28 to March 6, 2010
2009/09/10Matematikkens metode(r): Vedkommende videnskabsteori i gymnasiets matematikundervisning@ Fagligt-pædagogisk kursus i matematik (Middelfart, DK) September 10, 2009
2009/08/18CUDOS/PLACE: modes of science@ Scientific Practice PhD course (Department of Science Studies, Århus, DK) August 18, 2009
2009/06/21Are proofs mathematical experiments? Are mathematical experiments proofs?@ Miniworkshop: History and Philosophy of Mathematical Practice (Sandbjerg, DK) June 21 to 24, 2009
2009/06/18Are proofs mathematical experiments? Are mathematical experiments proofs?@ SPSP-2: Philosophy of Science in Practice (Minnesota, US) June 18 to 20, 2009
2009/05/04Vedkommende videnskabsteori i gymnasiets matematikundervisning@ Opstartsseminar om matematikkens videnskabsteori i gymnasiet (Nyborg, DK) May 4, 2009
2009/02/25Matematikkens metode(r): Videnskabsteori og matematikundervisning@ Fagligt-pædagogisk kursus i matematik (Middelfart, DK) February 25, 2009
2009/01/23Matematikkens metode(r): Videnskabsteori og matematikundervisning@ "Et rigtigt midtvejskursus i matematik" (Det almenpædagogiske samarbejde på Fyn, Svendborg, DK) January 23, 2009
2008/10/06What's experimental about experimental mathematics?@ Dansk Forskning i Matematikkens History og Filosofi VII (Holbæk, DK) October 6 to 7, 2008
2008/09/22What's experimental about experimental mathematics?@ Colloquium (Department of Science Studies, Århus, DK) September 22, 2008
2008/09/17Matematikkens metode(r): Videnskabsteori og matematikundervisning@ Fagligt-pædagogisk kursus i matematik (Middelfart, DK) September 17, 2008
2008/06/16What computers do to mathematics: The emergence of a sub-discipline of \emph{experimental mathematics}@ E-CAP08: 6th European Conference on Computing and Philosophy (Montpellier, FR) June 16 to 18, 2008
2008/05/16What computers do to mathematics: The emergence of a sub-discipline of \emph{experimental mathematics}@ PhiMSAMP-3: Philosophy of Mathematics - Sociological Aspects of Mathematical Practice (Vienna, AT) May 16 to 18, 2008
2008/04/17``Matematik er Ikke Noget For Søde Piger'' \Dash Mindretal, Stereotyper og Matematik på Film@ 3rd Department of Science Studies film seminar (Department of Science Studies, Århus, DK) April 17, 2008
2008/02/28Matematikkens metode(r) \dots\ et blik på matematikkens videnskabsteori@ Fagligt-pædagogisk kursus i matematik (Vejle, DK) February 28, 2008
2008/01/09Matematikkens videnskabsteori på bacheloruddannelsen i matematik ved Aarhus Universitet@ Matematiklærergruppen ved Århus Statsgymnasium (Århus, DK) January 9, 2008
2007/03/30Breaking the Enigma@ 2nd Steno Department film seminar (Steno Department, Århus, DK) March 30, 2007
2006/11/08Matematik i sprogvidenskabelig optik: Matematikkens sprog@ ``Tekster på tværs'' (Vesthimmerlands Gymnasium, Aars, DK) November 8, 2006
2006/04/24Matematik i sprogvidenskabelig optik: Matematikkens sprog@ ``Tekster på tværs'' (Marselisborg Gymnasium, Århus, DK) April 24, 2006
2006/03/31Et smukt sind - En smuk videnskab? Matematik og matematikere på film@ 1st Steno Department film seminar (Steno Department, Århus, DK) March 31, 2006
2006/03/09Matematikkens Videnskabsteori efter Århus-modellen@ Dansk Forskning i Matematikkens Historie og Filosofi V (Holbæk, DK) March 9, 2006
2002/05/10Introduktion til matematikkens grundlag og filosofi@ Thirteen episodes from the history of mathematics (History of Science Department, Århus, DK) May 10, 2002
2000/12/06Tymoczko og 4-farve-sætningen@ Philosophy of mathematics (History of Science Department, Århus, DK) December 6, 2000
2000/10/28Lakatos og matematikhistorien@ Philosophy of mathematics (History of Science Department, Århus, DK) October 28, 2000