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{{short description|Polish logician and philosopher}}
{{short description|Polish logician and philosopher}}
{{Infobox scientist
[[Image:Jaskowski.jpg|thumb|150px|Stanisław Jaśkowski]]
| name = Stanisław Jaśkowski
| image = Jaskowski.jpg
| image_size =
| caption =
| birth_date = {{birth date|df=yes|1906|4|22}}
| birth_place = [[Warsaw]], [[Congress Poland]]
| death_date = {{death date and age|df=yes|1965|11|16|1906|4|22}}
| death_place = [[Warsaw]], [[Polish People's Republic|Poland]]
| nationality = Polish
| fields = [[Logic]]
| workplaces = [[Nicolaus Copernicus University in Toruń]]
| alma_mater = [[University of Warsaw]]
| doctoral_advisor =
| doctoral_students =
| known_for = [[natural deduction]]<br />[[paraconsistent logic]]<br />[[proof theory]]<br />[[Formal semantics (logic)|formal semantics]]
| awards =
}}


'''Stanisław Jaśkowski''' (22 April 1906, in [[Warsaw]] – 16 November 1965, in Warsaw) was a [[Poland|Polish]] [[logician]] who made important contributions to [[proof theory]] and [[Formal semantics (logic)|formal semantics]]. He was a student of [[Jan Łukasiewicz]] and a member of the [[Lwów–Warsaw School of Logic]]. Upon his death his name was added to the Genius Wall of Fame. He was the President (rector) of the [[Nicolaus Copernicus University]] in [[Toruń]].
'''Stanisław Jaśkowski''' (<small>Polish pronunciation</small>: {{IPAc-pl|s|t|a|'|ń|s|w|a|f|-|j|a|ś|'|k|o|f|s|k|J|i}}; 22 April 1906, in [[Warsaw]] – 16 November 1965, in Warsaw) was a Polish [[logician]] who made important contributions to [[proof theory]] and [[Formal semantics (logic)|formal semantics]]. He was a student of [[Jan Łukasiewicz]] and a member of the [[Lwów–Warsaw School of Logic]]. He is regarded as one of the founders of [[natural deduction]], which he discovered independently of [[Gerhard Gentzen]] in the 1930s.<ref>{{Cite web |url=https://plato.stanford.edu/entries/natural-deduction/ |title=Natural Deduction Systems in Logic |website=plato.stanford.edu |date=29 October 2021 |access-date=2 May 2023}}</ref> He is also known for his research into [[paraconsistent logic]].<ref>{{Cite web |url=http://www.edukacja-filozoficzna.uw.edu.pl/index_pliki/ef74/ef-74-21.pdf |title=On the Polish "Via Modalization" Approach to Paraconsistency |website=edukacja-filozoficzna.uw.edu.pl |author=Ricardo Arturo Nicolás-Francisco |access-date=2 May 2023}}</ref> Upon his death, his name was added to the Genius Wall of Fame. He was the President (rector) of the [[Nicolaus Copernicus University]] in [[Toruń]].


==Life and career==
⚫
Jaśkowski is considered to be one of the founders of [[natural deduction]], which he discovered independently of [[Gerhard Gentzen]] in the 1930s. Gentzen's approach initially became more popular with logicians because it could be used to prove the [[cut-elimination theorem]]. However, Jaśkowski's is closer to the way that proofs are done in practice. He was also one of the first to propose a formal calculus of [[paraconsistent logic|inconsistency-tolerant (or paraconsistent) logic]]. Furthermore, Jaśkowski was a pioneer in the investigation of both [[intuitionistic logic]] and [[free logic]].
He was born in 1906 in [[Warsaw]] to father Feliks Jaśkowski and mother Kazimiera (nee Dzierzbicka). In 1924, he graduated from high school in [[Zakopane]] and enrolled at the [[University of Warsaw]] to study [[mathematics]]. He was taught [[mathematical logic]] under [[Jan Łukasiewicz]] and participated in the Polish Mathematicians' Congresses in [[Lviv]] (1927) and [[Vilnius]] (1931).

After the outbreak of [[World War II]], he participated in the [[September Campaign]] as a volunteer. In 1942, he was briefly imprisoned by the Germans. In 1945, he continued his scientific career at the [[Nicolaus Copernicus University|University of Toruń]] where he defended his [[habilitation]] and assumed the post of the head of the Faculty of Mathematical Logic.

Since 1950, he collaborated with the State Institute of Mathematics of the [[Polish Academy of Sciences]] (PAN). Between 1959–1962, he served as the Rector of the University. He was among the founders and served as the first President of the [[Polish Mathematical Society]]'s branch in Toruń.

⚫
Jaśkowski is considered to be one of the founders of [[natural deduction]], which he discovered independently of [[Gerhard Gentzen]] in the 1930s.<ref>{{cite journal |last1=Jaśkowski |first1=Stanisław |date=1934 |title=On the rules of suppositions in formal logic. |url= |journal=Polish Logic 1920–39 |volume= |issue= |pages= |doi= |access-date=}}</ref><ref>{{Cite book |chapter-url=https://link.springer.com/chapter/10.1007/978-3-319-65430-0_33 |chapter=Stanisław Jaśkowski and Natural Deduction Systems |website=link.springer.com |series=Studies in Universal Logic |date=2018 |doi=10.1007/978-3-319-65430-0_33 |access-date=2 May 2023 |last1=Indrzejczak |first1=Andrzej |title=The Lvov-Warsaw School. Past and Present |pages=465–483 |isbn=978-3-319-65429-4 }}</ref> Gentzen's approach initially became more popular with logicians because it could be used to prove the [[cut-elimination theorem]]. However, Jaśkowski's is closer to the way that proofs are done in practice. He was also one of the first to propose a formal calculus of [[paraconsistent logic|inconsistency-tolerant (or paraconsistent) logic]]. Furthermore, Jaśkowski was a pioneer in the investigation of both [[intuitionistic logic]] and [[free logic]].

He died in 1965 in [[Warsaw]] and was buried at the [[Powązki Cemetery]].<ref>{{Cite web |title=Warszawskie Zabytkowe Pomniki Nagrobne |url=https://cmentarze.um.warszawa.pl/pomnik.aspx?pom_id=6028 |archive-url=https://web.archive.org/web/20190422235516/https://cmentarze.um.warszawa.pl/pomnik.aspx?pom_id=6028 |archive-date=2019-04-22 |access-date=2 May 2023 |language=pl}}</ref>


==Works==
==Works==


* [http://www.logik.ch/daten/jaskowski.pdf ''On the Rules of Suppositions in Formal Logic''] Studia Logica 1, 1934 pp.&nbsp;5–32 (reprinted in: Storrs McCall (ed.), ''Polish Logic 1920-1939'', Oxford University Press, 1967 pp.&nbsp;232–258
* [http://www.logik.ch/daten/jaskowski.pdf ''On the Rules of Suppositions in Formal Logic''] [[Studia Logica]] 1, 1934 pp.&nbsp;5–32 (reprinted in: Storrs McCall (ed.), ''Polish Logic 1920-1939'', Oxford University Press, 1967 pp.&nbsp;232–258
* ''Investigations into the System of Intuitionist Logic'' 1936 (translated in: Storrs McCall (ed.), ''Polish Logic 1920-1939'', Oxford University Press, 1967 pp.&nbsp;259–263
* ''Investigations into the System of Intuitionist Logic'' 1936 (translated in: Storrs McCall (ed.), ''Polish Logic 1920-1939'', Oxford University Press, 1967 pp.&nbsp;259–263
* ''A propositional Calculus for Inconsistent Deductive Systems'' 1948 (reprinted in: Studia Logica, 24 1969, pp 143–157 and in: Logic and Logical Philosophy 7, 1999 pp.&nbsp;35–56)
* ''A propositional Calculus for Inconsistent Deductive Systems'' 1948 (reprinted in: Studia Logica, 24 1969, pp 143–157 and in: Logic and Logical Philosophy 7, 1999 pp.&nbsp;35–56)
* ''On the Discussive Conjunction in the Propositional Calculus for Inconsistent Deductive Systems'' 1949 (reprinted in: Logic and Logical Philosophy 7, 1999 pp.&nbsp;57–59)
* ''On the Discussive Conjunction in the Propositional Calculus for Inconsistent Deductive Systems'' 1949 (reprinted in: Logic and Logical Philosophy 7, 1999 pp.&nbsp;57–59)
* ''On Formulas in which no Individual Variable occurs more than Twice'', Journal of Symbolic Logic, 31, 1966, pp.&nbsp;1–6)
* ''On Formulas in which no Individual Variable occurs more than Twice'', [[Journal of Symbolic Logic]], 31, 1966, pp.&nbsp;1–6)


; in Polish:
; in Polish:
* ''O symetrii w zdobnictwie i przyrodzie - matematyczna teoria ornamentów'' (English title: ''On Symmetry in Art and Nature''), PWS, Warszawa, 1952 (book 168 pages)
* ''O symetrii w zdobnictwie i przyrodzie - matematyczna teoria ornamentów'' (English title: ''On Symmetry in Art and Nature''), PWS, Warszawa, 1952 (book 168 pages)
* ''Matematyczna teoria ornamentów'' (English title: ''Mathematical Theory of Ornaments''), PWN, Warszawa, 1957 (book 100 pages)
* ''Matematyczna teoria ornamentów'' (English title: ''Mathematical Theory of Ornaments''), PWN, Warszawa, 1957 (book 100 pages)

==See also==
*[[List of Poles#Mathematics|List of Polish mathematicians]]
*[[Timeline of Polish science and technology]]


==References==
==References==
{{reflist}}
⚫
* {{cite journal | author=Jerzy Perzanowski | title=Fifty Years of Parainconsistent Logics | journal=Logic and Logical Philosophy | year=1999 | volume=7 | pages=21&ndash;24 | url=http://www.logika.uni.torun.pl/llp/07/50l.pdf | url-status=dead | archiveurl=https://web.archive.org/web/20060404050604/http://www.logika.uni.torun.pl/llp/07/50l.pdf | archivedate=2006-04-04 }}

⚫
* {{cite web | author=Woleński, Jan| year=2003| title=Lvov-Warsaw School | work=The Stanford Encyclopedia of Philosophy (Summer 2003 Edition) | url=http://plato.stanford.edu/archives/sum2003/entries/lvov-warsaw/ | accessdate=2006-03-11}}
==Sources==
⚫
* {{cite journal | author=Jerzy Perzanowski |authorlink = Jerzy Perzanowski| title=Fifty Years of Parainconsistent Logics | journal=Logic and Logical Philosophy | year=1999 | volume=7 | pages=21&ndash;24 | url=http://www.logika.uni.torun.pl/llp/07/50l.pdf | url-status=dead | archiveurl=https://web.archive.org/web/20060404050604/http://www.logika.uni.torun.pl/llp/07/50l.pdf | archivedate=2006-04-04 }}
⚫
* {{cite encyclopedia | author=Woleński, Jan|authorlink = Jan Woleński| year=2003| title=Lvov-Warsaw School | encyclopedia=The Stanford Encyclopedia of Philosophy (Summer 2003 Edition) | url=http://plato.stanford.edu/archives/sum2003/entries/lvov-warsaw/ | accessdate=2006-03-11}}
* Jerzy Kotas, August Pieczkowski. ''Scientific works of Stanisław Jaśkowski'', Studia Logica 21, 1967, 7-15
* Jerzy Kotas, August Pieczkowski. ''Scientific works of Stanisław Jaśkowski'', Studia Logica 21, 1967, 7-15


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[[Category:Polish mathematicians]]
[[Category:Polish mathematicians]]
[[Category:University of Warsaw alumni]]
[[Category:University of Warsaw alumni]]
[[Category:Nicolaus Copernicus University in Toruń faculty]]
[[Category:Academic staff of Nicolaus Copernicus University in Toruń]]
[[Category:Paraconsistent logic]]
[[Category:Paraconsistent logic]]
[[Category:20th-century Polish philosophers]]
[[Category:20th-century Polish philosophers]]


{{Poland-mathematician-stub}}
{{Poland-philosopher-stub}}

Latest revision as of 02:15, 22 June 2024

Stanisław Jaśkowski
Born(1906-04-22)22 April 1906
Warsaw, Congress Poland
Died16 November 1965(1965-11-16) (aged 59)
Warsaw, Poland
NationalityPolish
Alma materUniversity of Warsaw
Known fornatural deduction
paraconsistent logic
proof theory
formal semantics
Scientific career
FieldsLogic
InstitutionsNicolaus Copernicus University in Toruń

Stanisław Jaśkowski (Polish pronunciation: [staˈɲsvaf jaɕˈkɔfskʲi]; 22 April 1906, in Warsaw – 16 November 1965, in Warsaw) was a Polish logician who made important contributions to proof theory and formal semantics. He was a student of Jan Łukasiewicz and a member of the Lwów–Warsaw School of Logic. He is regarded as one of the founders of natural deduction, which he discovered independently of Gerhard Gentzen in the 1930s.[1] He is also known for his research into paraconsistent logic.[2] Upon his death, his name was added to the Genius Wall of Fame. He was the President (rector) of the Nicolaus Copernicus University in Toruń.

Life and career

[edit]

He was born in 1906 in Warsaw to father Feliks Jaśkowski and mother Kazimiera (nee Dzierzbicka). In 1924, he graduated from high school in Zakopane and enrolled at the University of Warsaw to study mathematics. He was taught mathematical logic under Jan Łukasiewicz and participated in the Polish Mathematicians' Congresses in Lviv (1927) and Vilnius (1931).

After the outbreak of World War II, he participated in the September Campaign as a volunteer. In 1942, he was briefly imprisoned by the Germans. In 1945, he continued his scientific career at the University of Toruń where he defended his habilitation and assumed the post of the head of the Faculty of Mathematical Logic.

Since 1950, he collaborated with the State Institute of Mathematics of the Polish Academy of Sciences (PAN). Between 1959–1962, he served as the Rector of the University. He was among the founders and served as the first President of the Polish Mathematical Society's branch in Toruń.

Jaśkowski is considered to be one of the founders of natural deduction, which he discovered independently of Gerhard Gentzen in the 1930s.[3][4] Gentzen's approach initially became more popular with logicians because it could be used to prove the cut-elimination theorem. However, Jaśkowski's is closer to the way that proofs are done in practice. He was also one of the first to propose a formal calculus of inconsistency-tolerant (or paraconsistent) logic. Furthermore, Jaśkowski was a pioneer in the investigation of both intuitionistic logic and free logic.

He died in 1965 in Warsaw and was buried at the Powązki Cemetery.[5]

Works

[edit]
  • On the Rules of Suppositions in Formal Logic Studia Logica 1, 1934 pp. 5–32 (reprinted in: Storrs McCall (ed.), Polish Logic 1920-1939, Oxford University Press, 1967 pp. 232–258
  • Investigations into the System of Intuitionist Logic 1936 (translated in: Storrs McCall (ed.), Polish Logic 1920-1939, Oxford University Press, 1967 pp. 259–263
  • A propositional Calculus for Inconsistent Deductive Systems 1948 (reprinted in: Studia Logica, 24 1969, pp 143–157 and in: Logic and Logical Philosophy 7, 1999 pp. 35–56)
  • On the Discussive Conjunction in the Propositional Calculus for Inconsistent Deductive Systems 1949 (reprinted in: Logic and Logical Philosophy 7, 1999 pp. 57–59)
  • On Formulas in which no Individual Variable occurs more than Twice, Journal of Symbolic Logic, 31, 1966, pp. 1–6)
in Polish
  • O symetrii w zdobnictwie i przyrodzie - matematyczna teoria ornamentów (English title: On Symmetry in Art and Nature), PWS, Warszawa, 1952 (book 168 pages)
  • Matematyczna teoria ornamentów (English title: Mathematical Theory of Ornaments), PWN, Warszawa, 1957 (book 100 pages)

See also

[edit]

References

[edit]
  1. ^ "Natural Deduction Systems in Logic". plato.stanford.edu. 29 October 2021. Retrieved 2 May 2023.
  2. ^ Ricardo Arturo Nicolás-Francisco. "On the Polish "Via Modalization" Approach to Paraconsistency" (PDF). edukacja-filozoficzna.uw.edu.pl. Retrieved 2 May 2023.
  3. ^ Jaśkowski, Stanisław (1934). "On the rules of suppositions in formal logic". Polish Logic 1920–39.
  4. ^ Indrzejczak, Andrzej (2018). "Stanisław Jaśkowski and Natural Deduction Systems". The Lvov-Warsaw School. Past and Present. Studies in Universal Logic. pp. 465–483. doi:10.1007/978-3-319-65430-0_33. ISBN 978-3-319-65429-4. Retrieved 2 May 2023. {{cite book}}: |website= ignored (help)
  5. ^ "Warszawskie Zabytkowe Pomniki Nagrobne" (in Polish). Archived from the original on 2019-04-22. Retrieved 2 May 2023.

Sources

[edit]
[edit]
Retrieved from "https://en.wikipedia.org/w/index.php?title=Stanisław_Jaśkowski&oldid=1230324448"