Masao Ohnishi and Kazuo Matsumoto. Gentzen method in modal calculi. Osaka mathematical journal, vol. 9 no. 2 (1957), pp. 113–130. See Correction, Masao Ohnishi and Kazuo Matsumoto. Gentzen method in modal calculi. Osaka mathematical journal, vol. 10 (1958), p. 147.

1975 ◽  
Vol 40 (3) ◽  
pp. 466-467 ◽  
Author(s):  
Richard Routley
Keyword(s):  
1860 ◽  
Vol 150 ◽  
pp. 13-42

In the following paper I propose to resume more in detail the subject of a communication made to the Cambridge and Dublin Mathematical Journal (vol. viii. p. 25). The present investigations are restricted to the case of two variables. § 1. The Theory of ∇ and ∇ 1 .


2009 ◽  
Vol 50 (6) ◽  
pp. 945-946
Author(s):  
Yu. L. Ershov ◽  
S. S. Kutateladze
Keyword(s):  

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