%0 Journal Article %T Functional versions of the Caristi-Kirk theorem %A Turinici %A Mihai %J Revista de la Uni£¿3n Matem£¿£¿tica Argentina %D 2009 %I Uni¨®n Matem¨¢tica Argentina %X many functional versions of the caristi-kirk fixed point theorem are nothing but logical equivalents of the result in question. %K metric space %K lsc function %K fixed/periodic point %K normality %K local boundedness %K feng-liu property %K semimetric %K maximal element %K cauchy and asymptotic sequence %K regularity %K non-expansive map. %U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S0041-69322009000100010&lng=en&nrm=iso&tlng=en