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Alice 2023-10-16 12:53:35 +01:00
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commit 54d66491fe
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12
4a1s/MFES/PL - Aula 4.md
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@ -69,24 +69,30 @@ pred inv3 {
//or //or
all x :User, y :Photo | x in sees.y implies y in x.follows.posts + Ad all x :User, y :Photo | x in sees.y implies y in x.follows.posts + Ad
//or
all x :User, y :Photo | y in x.sees implies y in x.follows.posts + Ad
//or
all x :User | x.sees in x.follows.posts + Ad
} }
pred inv4 { pred inv4 {
// If a user posts an ad then all its posts should be labeled as ads. // If a user posts an ad then all its posts should be labeled as ads.
} }
pred inv5 { pred inv5 {
// Influencers are followed by everyone else. // Influencers are followed by everyone else.
all x: Influencer | follows.x = User-x
} }
pred inv6 { pred inv6 {
// Influencers post every day. // Influencers post every day.
all x: Influencer, y : Day | x.posts.date = y
} }