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Nelson Onuchic

Nelson Onuchic, Brazilian mathematician (Brodosqui, São Paulo State 12 March 1926 – São Carlos, São Paulo State 03 September 1999)

From Austrian descent
 
ACHIEVEMENTS
Authored 49 works
 
Obtained important findings about P spaces and uniform structures that earned him renown in international scientific community (1958-60)
 
Introduced new concepts in asymptotic equivalence
 
Generalized the concept of  exit point
 
Extended Waszewski topological method for differential equations with time-delay
 
Obtained an instability criterion more generalized that from Hale concept (1971)
 

EPONYMY

Hartman-Onuchic theorem (1963)

Hale-Onuchic asymptotic method (1964)   
 
See (in Portuguese)

http://www.athena.biblioteca.unesp.br/exlibris/bd/brc/33004137031P7/2006/badin_mg_me_rcla.pdf