R. L. Goodstein. Transfinite ordinals in recursive number theory. The journal of symbolic logic, vol. 12 (1947), pp. 123–129.

1948 ◽  
Vol 13 (3) ◽  
pp. 171-171
Author(s):  
David Nelson
Keyword(s):  
Author(s):  
Hugh L. Montgomery ◽  
Robert C. Vaughan
Keyword(s):  

Nature ◽  
2020 ◽  
Vol 580 (7802) ◽  
pp. 177-177
Author(s):  
Davide Castelvecchi

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