Twistor Geometry and Non-Linear Systems: Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980
Gespeichert in:
Internformat
MARC
LEADER | 00000nam a2200000zcb4500 | ||
---|---|---|---|
001 | BV041963019 | ||
003 | DE-604 | ||
005 | 20181123 | ||
007 | cr|uuu---uuuuu | ||
008 | 140709s1982 xx o|||| 10||| eng d | ||
020 | |a 9783540119722 |c Online |9 978-3-540-11972-2 | ||
024 | 7 | |a 10.1007/BFb0066021 |2 doi | |
035 | |a (OCoLC)838041310 | ||
035 | |a (DE-599)BVBBV041963019 | ||
040 | |a DE-604 |b ger |e aacr | ||
041 | 0 | |a eng | |
049 | |a DE-12 |a DE-473 |a DE-703 |a DE-29 |a DE-19 |a DE-91 |a DE-739 |a DE-355 |a DE-Aug4 |a DE-860 |a DE-M347 |a DE-70 |a DE-210 |a DE-634 |a DE-859 |a DE-1046 |a DE-706 |a DE-526 |a DE-521 |a DE-384 |a DE-573 |a DE-523 | ||
082 | 0 | |a 530.1 | |
245 | 1 | 0 | |a Twistor Geometry and Non-Linear Systems |b Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 |c edited by H.D. Doebner and T.D. Palev |
264 | 1 | |a Berlin [u.a.] |b Springer |c 1982 | |
300 | |a 1 Online-Ressource | ||
336 | |b txt |2 rdacontent | ||
337 | |b c |2 rdamedia | ||
338 | |b cr |2 rdacarrier | ||
490 | 1 | |a Lecture notes in mathematics |v 970 | |
650 | 0 | 7 | |a Nichtlineares System |0 (DE-588)4042110-7 |2 gnd |9 rswk-swf |
650 | 0 | 7 | |a Twistor |0 (DE-588)4186504-2 |2 gnd |9 rswk-swf |
655 | 7 | |0 (DE-588)1071861417 |a Konferenzschrift |y 1980 |z Primorsko |2 gnd-content | |
689 | 0 | 0 | |a Twistor |0 (DE-588)4186504-2 |D s |
689 | 0 | 1 | |a Nichtlineares System |0 (DE-588)4042110-7 |D s |
689 | 0 | |5 DE-604 | |
700 | 1 | |a Doebner, Heinz-Dietrich |d 1931-2022 |0 (DE-588)105921505 |4 edt | |
700 | 1 | |a Palev, Tchavdar D. |4 edt | |
776 | 0 | 8 | |i Erscheint auch als |n Druckausgabe |z 978-3-540-39418-1 |
830 | 0 | |a Lecture notes in mathematics |v 970 |w (DE-604)BV014303148 |9 970 | |
856 | 4 | 0 | |u https://doi.org/10.1007/BFb0066021 |x Verlag |3 Volltext |
912 | |a ZDB-1-SLN | ||
943 | 1 | |a oai:aleph.bib-bvb.de:BVB01-027405802 | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-12 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-634 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-526 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-210 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-521 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-1046 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-Aug4 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-573 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-M347 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-859 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-860 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-523 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-70 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-91 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-384 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-473 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-19 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-355 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-703 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-706 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-29 |p ZDB-1-SLN |x Verlag |3 Volltext | |
966 | e | |u https://doi.org/10.1007/BFb0066021 |l DE-739 |p ZDB-1-SLN |x Verlag |3 Volltext |
Datensatz im Suchindex
DE-BY-TUM_katkey | 2009269 |
---|---|
_version_ | 1821930813598466049 |
any_adam_object | |
author2 | Doebner, Heinz-Dietrich 1931-2022 Palev, Tchavdar D. |
author2_role | edt edt |
author2_variant | h d d hdd t d p td tdp |
author_GND | (DE-588)105921505 |
author_facet | Doebner, Heinz-Dietrich 1931-2022 Palev, Tchavdar D. |
building | Verbundindex |
bvnumber | BV041963019 |
collection | ZDB-1-SLN |
ctrlnum | (OCoLC)838041310 (DE-599)BVBBV041963019 |
dewey-full | 530.1 |
dewey-hundreds | 500 - Natural sciences and mathematics |
dewey-ones | 530 - Physics |
dewey-raw | 530.1 |
dewey-search | 530.1 |
dewey-sort | 3530.1 |
dewey-tens | 530 - Physics |
discipline | Physik |
doi_str_mv | 10.1007/BFb0066021 |
format | Electronic eBook |
fullrecord | <?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>03762nam a2200685zcb4500</leader><controlfield tag="001">BV041963019</controlfield><controlfield tag="003">DE-604</controlfield><controlfield tag="005">20181123 </controlfield><controlfield tag="007">cr|uuu---uuuuu</controlfield><controlfield tag="008">140709s1982 xx o|||| 10||| eng d</controlfield><datafield tag="020" ind1=" " ind2=" "><subfield code="a">9783540119722</subfield><subfield code="c">Online</subfield><subfield code="9">978-3-540-11972-2</subfield></datafield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/BFb0066021</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(OCoLC)838041310</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-599)BVBBV041963019</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-604</subfield><subfield code="b">ger</subfield><subfield code="e">aacr</subfield></datafield><datafield tag="041" ind1="0" ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="049" ind1=" " ind2=" "><subfield code="a">DE-12</subfield><subfield code="a">DE-473</subfield><subfield code="a">DE-703</subfield><subfield code="a">DE-29</subfield><subfield code="a">DE-19</subfield><subfield code="a">DE-91</subfield><subfield code="a">DE-739</subfield><subfield code="a">DE-355</subfield><subfield code="a">DE-Aug4</subfield><subfield code="a">DE-860</subfield><subfield code="a">DE-M347</subfield><subfield code="a">DE-70</subfield><subfield code="a">DE-210</subfield><subfield code="a">DE-634</subfield><subfield code="a">DE-859</subfield><subfield code="a">DE-1046</subfield><subfield code="a">DE-706</subfield><subfield code="a">DE-526</subfield><subfield code="a">DE-521</subfield><subfield code="a">DE-384</subfield><subfield code="a">DE-573</subfield><subfield code="a">DE-523</subfield></datafield><datafield tag="082" ind1="0" ind2=" "><subfield code="a">530.1</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Twistor Geometry and Non-Linear Systems</subfield><subfield code="b">Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980</subfield><subfield code="c">edited by H.D. Doebner and T.D. Palev</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="a">Berlin [u.a.]</subfield><subfield code="b">Springer</subfield><subfield code="c">1982</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">1 Online-Ressource</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="490" ind1="1" ind2=" "><subfield code="a">Lecture notes in mathematics</subfield><subfield code="v">970</subfield></datafield><datafield tag="650" ind1="0" ind2="7"><subfield code="a">Nichtlineares System</subfield><subfield code="0">(DE-588)4042110-7</subfield><subfield code="2">gnd</subfield><subfield code="9">rswk-swf</subfield></datafield><datafield tag="650" ind1="0" ind2="7"><subfield code="a">Twistor</subfield><subfield code="0">(DE-588)4186504-2</subfield><subfield code="2">gnd</subfield><subfield code="9">rswk-swf</subfield></datafield><datafield tag="655" ind1=" " ind2="7"><subfield code="0">(DE-588)1071861417</subfield><subfield code="a">Konferenzschrift</subfield><subfield code="y">1980</subfield><subfield code="z">Primorsko</subfield><subfield code="2">gnd-content</subfield></datafield><datafield tag="689" ind1="0" ind2="0"><subfield code="a">Twistor</subfield><subfield code="0">(DE-588)4186504-2</subfield><subfield code="D">s</subfield></datafield><datafield tag="689" ind1="0" ind2="1"><subfield code="a">Nichtlineares System</subfield><subfield code="0">(DE-588)4042110-7</subfield><subfield code="D">s</subfield></datafield><datafield tag="689" ind1="0" ind2=" "><subfield code="5">DE-604</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Doebner, Heinz-Dietrich</subfield><subfield code="d">1931-2022</subfield><subfield code="0">(DE-588)105921505</subfield><subfield code="4">edt</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Palev, Tchavdar D.</subfield><subfield code="4">edt</subfield></datafield><datafield tag="776" ind1="0" ind2="8"><subfield code="i">Erscheint auch als</subfield><subfield code="n">Druckausgabe</subfield><subfield code="z">978-3-540-39418-1</subfield></datafield><datafield tag="830" ind1=" " ind2="0"><subfield code="a">Lecture notes in mathematics</subfield><subfield code="v">970</subfield><subfield code="w">(DE-604)BV014303148</subfield><subfield code="9">970</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-SLN</subfield></datafield><datafield tag="943" ind1="1" ind2=" "><subfield code="a">oai:aleph.bib-bvb.de:BVB01-027405802</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-12</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-634</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-526</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-210</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-521</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-1046</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-Aug4</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-573</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-M347</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-859</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-860</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-523</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-70</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-91</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-384</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-473</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-19</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-355</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-703</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-706</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-29</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="966" ind1="e" ind2=" "><subfield code="u">https://doi.org/10.1007/BFb0066021</subfield><subfield code="l">DE-739</subfield><subfield code="p">ZDB-1-SLN</subfield><subfield code="x">Verlag</subfield><subfield code="3">Volltext</subfield></datafield></record></collection> |
genre | (DE-588)1071861417 Konferenzschrift 1980 Primorsko gnd-content |
genre_facet | Konferenzschrift 1980 Primorsko |
id | DE-604.BV041963019 |
illustrated | Not Illustrated |
indexdate | 2024-12-20T16:58:51Z |
institution | BVB |
isbn | 9783540119722 |
language | English |
oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-027405802 |
oclc_num | 838041310 |
open_access_boolean | |
owner | DE-12 DE-473 DE-BY-UBG DE-703 DE-29 DE-19 DE-BY-UBM DE-91 DE-BY-TUM DE-739 DE-355 DE-BY-UBR DE-Aug4 DE-860 DE-M347 DE-70 DE-210 DE-634 DE-859 DE-1046 DE-706 DE-526 DE-521 DE-384 DE-573 DE-523 |
owner_facet | DE-12 DE-473 DE-BY-UBG DE-703 DE-29 DE-19 DE-BY-UBM DE-91 DE-BY-TUM DE-739 DE-355 DE-BY-UBR DE-Aug4 DE-860 DE-M347 DE-70 DE-210 DE-634 DE-859 DE-1046 DE-706 DE-526 DE-521 DE-384 DE-573 DE-523 |
physical | 1 Online-Ressource |
psigel | ZDB-1-SLN |
publishDate | 1982 |
publishDateSearch | 1982 |
publishDateSort | 1982 |
publisher | Springer |
record_format | marc |
series | Lecture notes in mathematics |
series2 | Lecture notes in mathematics |
spellingShingle | Twistor Geometry and Non-Linear Systems Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 Lecture notes in mathematics Nichtlineares System (DE-588)4042110-7 gnd Twistor (DE-588)4186504-2 gnd |
subject_GND | (DE-588)4042110-7 (DE-588)4186504-2 (DE-588)1071861417 |
title | Twistor Geometry and Non-Linear Systems Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 |
title_auth | Twistor Geometry and Non-Linear Systems Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 |
title_exact_search | Twistor Geometry and Non-Linear Systems Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 |
title_full | Twistor Geometry and Non-Linear Systems Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 edited by H.D. Doebner and T.D. Palev |
title_fullStr | Twistor Geometry and Non-Linear Systems Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 edited by H.D. Doebner and T.D. Palev |
title_full_unstemmed | Twistor Geometry and Non-Linear Systems Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 edited by H.D. Doebner and T.D. Palev |
title_short | Twistor Geometry and Non-Linear Systems |
title_sort | twistor geometry and non linear systems review lectures given at the 4th bulgarian summer school on mathematical problems of quantum field theory held at primorsko bulgaria september 1980 |
title_sub | Review Lectures given at the 4th Bulgarian Summer School on Mathematical Problems of Quantum Field Theory, Held at Primorsko, Bulgaria, September 1980 |
topic | Nichtlineares System (DE-588)4042110-7 gnd Twistor (DE-588)4186504-2 gnd |
topic_facet | Nichtlineares System Twistor Konferenzschrift 1980 Primorsko |
url | https://doi.org/10.1007/BFb0066021 |
volume_link | (DE-604)BV014303148 |
work_keys_str_mv | AT doebnerheinzdietrich twistorgeometryandnonlinearsystemsreviewlecturesgivenatthe4thbulgariansummerschoolonmathematicalproblemsofquantumfieldtheoryheldatprimorskobulgariaseptember1980 AT palevtchavdard twistorgeometryandnonlinearsystemsreviewlecturesgivenatthe4thbulgariansummerschoolonmathematicalproblemsofquantumfieldtheoryheldatprimorskobulgariaseptember1980 |