Expresión 5: "x" equals "e" Superscript, "y" , Baseline natural log "e" Superscript, "y" , Baseline left brace, "y" less than or equal to 0 , right bracex=eylneyy≤0
5
Expresión 6: "x" equals negative "e" Superscript, "y" , Baseline natural log "e" Superscript, "y" , Baseline left brace, "y" less than or equal to 0 , right bracex=−eylneyy≤0
6
Expresión 7: "x" equals "e" Superscript, negative "y" , Baseline natural log "e" Superscript, "y" , Baseline left brace, "y" greater than or equal to 0 , right bracex=e−ylneyy≥0
7
Expresión 8: "x" equals negative "e" Superscript, negative "y" , Baseline natural log "e" Superscript, "y" , Baseline left brace, "y" greater than or equal to 0 , right bracex=−e−ylneyy≥0