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21.
Katarzyna Pałasińska 《Studia Logica》1994,53(3):361-372
There are exactly two nonfinitely axiomatizable algebraic matrices with one binary connective o such thatx(yz) is a tautology of . This answers a question asked by W. Rautenberg in [2], P. Wojtylak in [8] and W. Dziobiak in [1]. Since every 2-element matrix can be finitely axiomatized ([3]), the matrices presented here are of the smallest possible size and in some sense are the simplest possible.Presented byWolfgang Rautenberg 相似文献
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Zdzisław Dywan 《Studia Logica》1980,39(1):1-4
In [2] A. Wroski proved that there is a strongly finite consequence C which is not finitely based i.e. for every consequence C
+ determined by a finite set of standard rules C C
+. In this paper it will be proved that for every strongly finite consequence C there is a consequence C
+ determined by a finite set of structural rules such that C(Ø)=C
+(Ø) and
=
(where
,
are consequences obtained by adding to the rules of C, C
+ respectively the rule of substitution). Moreover it will be shown that under certain assumptions C=C
+. 相似文献
25.
Social perspective-taking and adjustment in emotionally disturbed,learning-disabled,and normal children 总被引:2,自引:0,他引:2
Dr. Jill M. Waterman William E. Sobesky Louise Silvern Bart Aoki Marci McCaulay 《Journal of abnormal child psychology》1981,9(1):133-148
Preadolescent emotionally disturbed, learning-disabled, and normal boys were compared on social perspective-taking and behavioral measures to examine possible contributions of social cognitive deficits to children's adjustment problems. Antisocial-prosocial and withdrawn-gregarious behavior dimensions were studied through subscales derived from teacher ratings. Results indicated that across all groups, high perspective-taking was associated with significantly less withdrawal than was low perspective-taking; within groups, this finding was significant only for the emotionally disturbed boys. Contrary to theoretical assumptions, antisocial behavior was not significantly related to perspective-taking across the sample. Among emotionally disturbed boys, relatively higher affective perspectivetaking was significantly correlated with higher antisocial behavior. This positive correlation for the emotionally disturbed group was significantly different from the nonsignificant negative correlation between antisocial behavior and perspective-taking among normals. Findings for learning-disabled boys were intermediate. between results for emotionally disturbed and normal boys on both perspectivetaking and behavioral measures, and the learning-disabled group generally did not differ significantly from either other group. Theoretical and clinical implications of the findings are discussed
The authors acknowledge the invaluable assistance and cooperation of many teachers and principals in Jefferson County School District in Colorado, especially Ms. Norma Sobesky, coordinator of the program for Significantly Impaired Emotionally and Behaviorally Disturbed Children, and Ms. Beth Young, coordinator of the program for Perceptual and Communicative Disorders. 相似文献
26.
Wiesław Dziobiak 《Studia Logica》1981,40(3):249-252
We prove that each intermediate or normal modal logic is strongly complete with respect to a class of finite Kripke frames
iff it is tabular, i.e. the respective variety of pseudo-Boolean or modal algebras, corresponding to it, is generated by a
finite algebra.
The author wishes to thank the Editors for calling his attention to the fact that the result of this paper concerning the
intermediate logics was announced earlier by A. Wroński at the conference “Logical calculi”, Wrocław, October 5–7, 1975, though
without proof. Wroński's result has not been published. 相似文献
27.
The intuitionistic consequence operation restricted to the language with (equivalence) and (negation) as the only connectives is axiomatized by means of a finite set of sequential rules of inference.To the memory of Professor Roman Suszko 相似文献
28.
Wiesław Dziobiak 《Studia Logica》1982,41(1):67-73
The aim of this note is to show (Theorem 1.6) that in each of the cases: = {, }, or {, , }, or {, , } there are uncountably many -intermediate logics which are not finitely approximable. This result together with the results known in literature allow us to conclude (Theorem 2.2) that for each : either all -intermediate logics are finitely approximate or there are uncountably many of them which lack the property. 相似文献
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