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	Stanislaw Lesniewski
		Lesniewski was the son of one of the civil engineers chiefly responsible for the construction and supervision of the trans-Siberian railroad.
		Although Lesniewski then definitely turned his back on philosophy in favour of logic--he later spoke of himself as a renegade from philosophy--his initial impression of mathematical logic was not at all favourable.
		Lesniewski developed his logical systems with a clarity and precision that established a new standard for mathematical rigour.
	www.cs.ualberta.ca /~piotr/Mizar/mirror/http/sum/lesniewski.html (1218 words)

	Stanislaw Lesniewski Biography / Biography of Stanislaw Lesniewski World of Mathematics Biography
		Lesniewski became an impassioned student of logic when he perceived that the antimonies (paradoxes) in mathematics and logic discussed in the book were a dire threat to the foundations of deductive science.
		Lesniewski developed these separate yet complementary systems of logic using a precision and clarity that forever raised the bar for standards of mathematical rigor, as well as establishing the Warsaw school of logic as the world's most advanced.
		Lesniewski was given a full professorship at the University of Warsaw in 1936, after which he spent several months of that year touring the scientific centers of Europe.
	www.bookrags.com /biography-stanislaw-lesniewski-wom (772 words)

	Stanislaw Lesniewski
		Stanislaw Lesniewski was born on March 28th (March 16th according to the Old Calendar), 1886 (fn) in
		Lesniewski expressed to Twardowski his desire to defend the dissertation in Lvov (see the Lesniewski's letter to Twardowski), but finally he did not succeed: in Warsaw, (July 2nd 1919), Twardowski announced on behalf of Wartenberg the latter's opposition to Lesniewski's habilitation (see the Twardowski's diaries).
		Lesniewski's negative opinion regarding many-valued logic may be observed in his participation in the discussion on the lecture by Lukasiewicz "Genesis of Three-valued Logic" (1938), in which he strongly attacked Lukasiewicz's views.
	www.fmag.unict.it /~polphil/PolPhil/Lesnie/Lesnie2.html (3682 words)

	Stanislaw Lesniewski and the Calculus of Names (Ontology)
		Kotarbinski noted that Lesniewski "calls his system `ontology' in harmony with certain terms used earlier (as in the `ontological principle of contradiction')", and in strict relation to the Greek root of `ontology' as the participle of the verb `to be'.
		Lesniewski's `ontology' is therefore "closely connected with traditional Aristotelian formal logic, of which it is an extension and an improvement, while on the other hand it is a terminal point in the attempt to construct a calculus of names in the area of logistic...
		Lesniewski commented on Kotarbinski's remarks thus: "I used the name `ontology' to characterize the theory I was developing, without offence to my `linguistic instincts' because I was formulating in that theory a certain kind of `general principles of existence"' [FM, 374].
	www.formalontology.it /lesniewskis.htm (1441 words)

	Lukasiewicz and Lesniewski on Contradiction - Dr Arianna Betti
		Lesniewski refutes the synonymousness of OPC with (4) for the non-connotativity of ‘object’.
		Lesniewski accepts the distinction between logical and ontological principles, but certainly for him there is not one between metaphysical and ontological ones: ontology and metaphysics are interchangeable names to speak of the system of the sentences about all the objects in general, where ‘object’ always stands for ‘existing object’.
		Lesniewski was arguing that any ‘intensional function’ such as, for instance, ‘is possible that P’ had to be ‘de-intensionalized’ in order to be examined on the basis of extensional and bivalent logic, since he did not know any system of intensional logic that on his opinion was satisfactory.
	evans-experientialism.freewebspace.com /ariannabetti.htm (4532 words)

	Sempiternal Truth. The Bolzano-Twardowski-Lesniewski Axis (Site not responding. Last check: 2007-11-06)
		In 1913 Stanislaw Lesniewski published his article on the sempiternity of truth, "Is Truth only Eternal or is it either Eternal and Sempiternal?" (1913) (1).
		Lesniewski assumes the logical principle of contradiction and the principle of bivalence - which turns out to be a special case of the ontological tertium non datur - consequently denying the existence of indefinite sentences (neither true nor false) (72).
		Thus in Lesniewski the guarantee of the truth of a sentence and the guarantee of the objectivity and omnitemporality of that truth depend in a very strong sense uniquely on the existence of the truth-maker of the sentence.
	eber.kul.lublin.pl /~polhome/PolPhil/Tward/BettiSemp.html (7717 words)

	References for Lesniewski
		Bibliography of Stanislaw Lesniewski, in Stanislaw Lesniewski aujourd'hui, Grenoble, October 8-10, 1992 (Neuchâtel, 1996), 21-24.
		J Wolenski, Stanislaw Lesniewski (Polish), in Mathematics at the turn of the twentieth century, Jaworze, 1988 (Katowice, 1992), 39-44.
		J Wolenski, Lesniewski's logic and the concept of being, in Stanislaw Lesniewski aujourd'hui, Grenoble, October 8-10, 1992 (Neuchâtel, 1996), 93-101.
	www-groups.dcs.st-and.ac.uk /~history/References/Lesniewski.html (460 words)

	Stanislaw Lesniewski (Site not responding. Last check: 2007-11-06)
		Lesniewski was a leading personality in the Lvov-Warsaw School, and immensely influential.
		Stanislaw Lesniewski was born on March 28th (March 16th according to the Old Calendar), 1886 in
		Lesniewski asked Twardowski to support his candidature in Lvov, but the plan was contrasted by Mscislaw Wartenberg (see the Wartenberg's letter to Twardowski).
	eber.kul.lublin.pl /~polhome/PolPhil/Lesnie/Lesnie.html (3155 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Stanislaw Lesniewski's influence upon his sole doctoral student Alfred Tarski is generally speaking recognised.
		My aim will be here to show that who takes on such an investigation must take into account not only the Lesniewski of the logical systems, but also the Lesniewski of the so-called 'prelogistic phase' (1911-13).
		We have here in print evidence of the idea that it is necessary to sanitize ordinary language for scientific purposes, an idea which Lesniewski introduced - with a splendid metaphor (the "Porohy on the Dniepr") - twenty years before Tarski.
	www.mimuw.edu.pl /TARSKI/abstracts/betti.html (263 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Stanislaw Lesniewski (1886--1939), one of the most influential and prominent Polish logicians of the twentieth century, created his system of the foundations of mathematics, a system comprising three deductive theories: Protothetic, Ontology, and Mereology.
		Although Lesniewski's work was extremely influential, in his lifetime he published only a few hundred pages.
		Lesniewski's system of the foundations of mathematics, the most important among Lesniewski's contributions, was reconstructed by Sobocinski during 1939--1944.
	www.cs.yorku.ca /~zbigniew/pr_les.html (365 words)

	Stanislaw Lesniewski
		It seems that Lesniewski completed his mathematical education in Lvov, taking an interest in logical paradoxes, Schroeder's algebra of logic, the theory of relations and probability theory.
		The paper, which is a very refined treatise, already sets forth all the features which were to be typical of Lesniewski's whole work: terminological accuracy, an obsession with clearness, the search for a language which was most suitable for science.
		Lesniewski's letter to Twardowski), but finally he did not succeed: in Warsaw, (July 2nd 1919), Twardowski announced on behalf of Wartenberg the latter's opposition to Lesniewski's habilitation (see the
	www.fmag.unict.it /~polphil/PolPhil/Lesnie/Lesnie.html (3189 words)

	LavaCUBED \Society\Philosophy\Philosophers\L\Lesniewski,_Stanislaw (Site not responding. Last check: 2007-11-06)
		Lesniewski's Early Solution to the Liar and Tarski - Abstract of a paper by Arianna Betti.
		Lesniewski's System of the Foundations of Mathematics - Background information on Lesniewski's work.
		Mizar: Stanislaw Lesniewski - Biography and a review of his chief achievements in logic.
	www.lavacubed.com /new.cats.php?path=/Society/Philosophy/Philosophers/L/Lesniewski,_Stanislaw (72 words)

	Citations: Foundations of the general theory of sets - Lesniewski (ResearchIndex) (Site not responding. Last check: 2007-11-06)
		Lesniewski, S., "Foundations of the general theory of sets", in: Surma, Srzednicki, Barnett, Rickey (eds.), Stanislaw Lesniewski, Collected Works, Dordrecht,Kluwer, pp.
		Lesniewski, S., Foundations of the general theory of sets, in Stanislaw Lesniewski, Collected Works (Surma,S. J., Srzednicki, J. T., Barnett, D. and Rickey, V.F., Eds.), Kluwer, Dordrecht 1992, pp.128-173.
		Lesniewski, S., Foundations of the general theory of sets, in Stanislaw Lesniewski, Collected Works (Surma,S. J., Srzednicki, J.T., Barnett, D.I. and Rickey, V.F., Eds.), Kluwer, Dordrecht 1992, 128-173.
	citeseer.ist.psu.edu /context/239644/0 (861 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		The `deductions' that can be found in his 1916 work on the general theory of sets are based on his logical intuitions which eventually were captured in the axioms and directives of Protothetic and Ontology.
		In 1921, having developed his systems of Mereology and Ontology, Lesniewski was ready to search for a general system `of first principles', i.e., Protothetic.
		The title Lesniewski's Systems: Protothetic is not intended to suggest that all important papers devoted to Protothetic are included here, for many have been left out either because they were similar in content to those included in the present volume or simply because they were too numerous to be included in a single volume.
	www.cs.yorku.ca /~zbigniew/book_proto.html (286 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Series: Penn State Logic Seminar Date: Tuesday, April 18, 2000 Speaker: Ryan Kohl, Penn State, Mathematics and Philosophy Title: Lesniewski's Protothetic Time: 2:30 - 3:20 PM Place: 219 Thomas Building Abstract: Stanislaw Lesniewski was a prominent logician working at the Lwow-Warsaw School of Logic between 1910 and 1939.
		A definition is said to be creative in a deductive theory for a thesis X if and only if X does not contain the defined term (nor any defined via it) and is provable using the definition, but not without it.
		I will present a brief outline of the Lesniewski’s logical system and proceed to focus on the use of creative definitions in his Protothetic.
	www.math.psu.edu /simpson/logic/seminar/000418.txt (186 words)

	Major work in logic (from Stanislaw Lesniewski) -- Encyclopædia Britannica
		The distinctive and original contribution of Lesniewski consists in the construction of three interrelated logical systems, to which he gave the names, derived from the Greek, of protothetic, ontology, and mereology (q.v.
		More results on "Major work in logic (from Stanislaw Lesniewski)" when you join.
		Biographical sketch of this Ukrainian-born mathematician known for his role in the development of hydrogen bomb and the work in topology, ergodic theory, and group theory.
	www.britannica.com /eb/article-4164?tocId=4164 (681 words)

	Directory - Society: Philosophy: Philosophers: L: Lesniewski, Stanislaw
		Mizar: Stanislaw Lesniewski · cached · Biography and a review of his chief achievements in logic.
		Lesniewski's System of the Foundations of Mathematics · cached · Background information on Lesniewski's work.
		Lesniewski's Early Solution to the Liar and Tarski · cached · Abstract of a paper by Arianna Betti.
	www.incywincy.com /default?p=1162002 (71 words)

	Life (from Stanislaw Lesniewski) -- Encyclopædia Britannica
		After preliminary schooling in Russia and the Gymnasium in Siberia, he attended—as was the custom of the time—several universities in continental Europe, finally taking his doctoral degree in 1912 at the Polish University of…
		More results on "Life (from Stanislaw Lesniewski)" when you join.
		Brief note on the life and works of this Ukraine-born mathematician known for his contributions to partial differential equations, potential theory, and mathematical physics.
	www.britannica.com /eb/article-4163?tocId=4163 (666 words)

	Lesniewski's Ontology (Site not responding. Last check: 2007-11-06)
		[1] Sanislaw Lesniewski, On the Foundations of Mathematics, translated and reprinted in Stanislaw J. Surma, Jan T.
		Srzednicki, and D. I, Barnett eds., Stanislaw Lesniewski: Collected Works, Volume 1, 1992, Kluwer Academic Publishers: Dordrecht, pp.
		[2] Sanislaw Lesniewski, On the Foundations of Ontology, translated and reprinted in Stanislaw J. Surma, Jan T. Srzednicki, and D. I, Barnett eds., Stanislaw Lesniewski: Collected Works, Volume 2, 1992, Kluwer Academic Publishers: Dordrecht, pp.
	www2005.lang.osaka-u.ac.jp /~ogata/Lesniewski.html (329 words)

	Stanislaw
		1921 Stanislaw Lem, born in Poland, sci-fi author, Solaris, Invincible
		1868 Wladyslaw Stanislaw Reymont, Poland, novelist, Chiopi, Nobel-1924
		1766 Stanislaw Leszcynski, duke of Lutherans/king of Poland, dies
	www.brainyhistory.com /topics/s/stanislaw.html (85 words)

	O. Le Blanc, Lukasiewicz, Aristotle, and Contradiction
		In its time this book significantly influenced the intellectual development of a succession of Polish 'philosophers' and 'philosophising' scholars of my generation, and it was in many respects a revelation to me personally.
		From it I learned for the first time of the existence of 'symbolic logic', of Bertrand Russell, and of his 'antinomy' concerning 'the class of the classes which are not elements of themselves’ (Lesniewski 1927, p.
		Second, that it is reasonable to accept the statements by Sobocinski, Lesniewski, Lejewski, and myself.
	www.fmag.unict.it /~polphil/PolPhil/Lukas/LeBlanc.html (5417 words)

	Amazon.ca: Books: Stanislaw Lesniewski: Collected Works Volumes I and II (Site not responding. Last check: 2007-11-06)
		Amazon.ca: Books: Stanislaw Lesniewski: Collected Works Volumes I and II Search
		Stanislaw Lesniewski: Collected Works Volumes I and II
		Top of Page : Stanislaw Lesniewski: Collected Works Volumes I and II
	www.amazon.ca /exec/obidos/ASIN/079231512X (190 words)

	The Mathematics Genealogy Project - Stanislaw Lesniewski
		Click here to see the students listed in chronological order.
		According to our current on-line database, Stanislaw Lesniewski has 1 students and 423 descendants.
		If you have additional information or corrections regarding this mathematician, please use the update form.
	genealogy.math.ndsu.nodak.edu /html/id.phtml?id=13345 (99 words)

	Society Philosophy Philosophers L Lesniewski, Stanislaw (Site not responding. Last check: 2007-11-06)
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		» Lesniewski's Early Solution to the Liar and Tarski
	whizseek.org /Society/Philosophy/Philosophers/L/Lesniewski,_Stanislaw (107 words)

	☞ Internet guide - Society - Philosophy - Philosophers - L - Lesniewski, Stanislaw
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	www.guide.vang.net /Guide/Society/Philosophy/Philosophers/L/Lesniewski,_Stanislaw (112 words)

	EpistemeLinks: Search engine links for philosopher Stanislaw Lesniewski
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