! " #$%& "" ' ( ' + , +( , )*( - /( .( . "0 ' 1 ' " ! '" 1 ∈ # # 67 # # 3 4 43 4 # 1# 1 3 1 3 1 ∈ 28 6 7 (8 2 * 5 1# ∈ # 67 498 4 4 2 6 7# 4 4 2 # (4 (4 2 (4 # 9 2 9 # (9 (9 2 (98 4 9 2 1 3 # ' " # 34 # # 67 # 28 6 7 (8 4 4 2 6 7# 2 (4 # 9 ⊆ # 9 2 4 2 4 67 498 2 4 4 4 4 2 4 # (4 (4 9 # (9 (9 2 (98 67 4 2 4 2 (98 : .' " . - 67 - 67 - >6 <' "" 8 5 = ! - 8 ' ' . 4 4>6 7 # 3 5 # 5 3 = # = 3 <' "" # <' "" 3 <' "" 5 # <' "" 5 3 <' "" = # <' "" = 3 8 ; .' " . - 67 - 67 - >6 <' "" 8 5 = 8 ' ' + )@ - ⊆ 7 , . 4 4>6 5 :& <' "" 5 <' "" 2? 8 :& 2? ? 2 (' '' ' 5 A :& <' "" ⊆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abella_1 Tabella_1 == Studenti(Nome,Cognome,Matricola,DataDiNascita) Studenti(Nome,Cognome,Matricola,DataDiNascita) Tabella_2 Tabella_2 == EsamiSuperati(Matricola,Data,Materia,Voto) EsamiSuperati(Matricola,Data,Materia,Voto) RR == {Studenti(Nome,Cognome,Matricola,DataDiNascita), {Studenti(Nome,Cognome,Matricola,DataDiNascita), EsamiSuperati(Matricola,Data,Materia,Voto)} EsamiSuperati(Matricola,Data,Materia,Voto)} # 4 5 . -' ' (' # . # I6 7 # 3 8 EsamiSuperati(Matricola,Data,Materia,Voto) EsamiSuperati(Matricola,Data,Materia,Voto) 5 ( - . 5 . 6 7 # I# JIJ8 RR == {Studenti(Nome,Cognome,Matricola,DataDiNascita), {Studenti(Nome,Cognome,Matricola,DataDiNascita), EsamiSuperati(Matricola,Data,Materia,Voto)} EsamiSuperati(Matricola,Data,Materia,Voto)}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⊂ T ( 5 <' "" 1 ) = = % = < ( = = ) 2 2:: # 22:; # 2: # 222 &$B%?; $&$$ &$; # 22:; 2: > > '" 5 1 / / > > 51 / / / / ! 6 6 *" > > + / / 2 = = (' ( 1 /0 5 1 &7'%89 %8:&5:5' 892 77 7 87'% 892 432887 %9:&5:5' 789 '7 7 87'% 789 432882 %9:&5:5' 789 '7 955329 &8:&5:5' 789 8' 8'4389 %5:5&:57 892 77 ( %12345 ( %12345 )6 %12345 > ( > ) ) ( ( ( 6 (1 1 = = ( 6( ( ( ;&& < " ) 6 " ) 6 ! ;&5 ;&5 7 87'% ( %12345 )6 %12345 : 8 < 1 ' 1 - 1 1 " . ' '" '" ' &7'%89 %8:&5:5' 892 77 7 87'% 892 432887 %9:&5:5' 789 '7 7 87'% 789 432882 %9:&5:5' 789 '7 ( 955329 &8:&5:5' 789 8' ( %12345 8'4389 %5:5&:57 892 77 )6 %12345 ( ( 6 (1 1 = = ( 6( ( %12345 > ( > ) ) ( ( ;&& < ! 7 87'% ;&5 " ) 6 " ) 6 ;&5 ( %12345 )6 %12345 ; < 1 ! ! #. > .! " - G *" * '" &7'%89 %8:&5:5' 892 77 7 87'% 892 432887 %9:&5:5' 789 '7 7 87'% 789 432882 %9:&5:5' 789 '7 955329 &8:&5:5' 789 8' 8'4389 %5:5&:57 892 77 ( ( 6 (1 1 = = ( 6( ( ( %12345 ( %12345 )6 %12345 > ( > ) ) ( ( ;&& < ! 7 87'% ;&5 " ) 6 " ) 6 ;&5 ( %12345 )6 %12345 ? < 1 ! 2. - 1 H' 5 ' 1 "0 &7'%89 %8:&5:5' 892 77 432887 %9:&5:5' " '7 432882 %9:&5:5' " '7 955329 &8:&5:5' " 8' 8'4389 %5:5&:57 892 77 ( ( 6 (1 1 = = ( 6( ( 1 >D ' H' 1 7 87'% 892 7 87'% 789 ( %12345 ( %12345 )6 %12345 * > ( > ) ) ( ( ;&& < " ) 6 " ) 6 ! ;&5 ;&5 7 87'% ( %12345 )6 %12345 % 9 ) # ) # ( < " ' (( " " " ( ' K A ' " 1 ( S' " ' ( " ' " " ' ( " " 1 ' - D 5 51 (' " 1 '* " ( B ) ) < ( 1 "" 1 ' " ' ! " . ' " @ -D 5 51 '* (' " 1 " 1 " ( $ 10