scholarly journals Five-dimensional para-CR manifolds and contact projective geometry in dimension three

Author(s):  
Joël Merker ◽  
Paweł Nurowski
1993 ◽  
Vol 54 (2) ◽  
pp. 191-206 ◽  
Author(s):  
K.C. Gupta ◽  
Suryansu Ray
Keyword(s):  

Author(s):  
Tilman Sauer ◽  
Tobias Schütz

AbstractWe discuss Einstein’s knowledge of projective geometry. We show that two pages of Einstein’s Scratch Notebook from around 1912 with geometrical sketches can directly be associated with similar sketches in manuscript pages dating from his Princeton years. By this correspondence, we show that the sketches are all related to a common theme, the discussion of involution in a projective geometry setting with particular emphasis on the infinite point. We offer a conjecture as to the probable purpose of these geometric considerations.


1969 ◽  
Vol 76 (10) ◽  
pp. 1168
Author(s):  
Josephine H. Chanler ◽  
Robert J. Bumcrot
Keyword(s):  

1991 ◽  
Vol 290 (1) ◽  
pp. 441-462 ◽  
Author(s):  
Mark McConnell

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