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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
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)


Hartman-Onuchic theorem (1963)

Hale-Onuchic asymptotic method (1964)   
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