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vault backup: 2023-10-23 20:08:40

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Alice 2023-10-23 20:08:40 +01:00
parent 64958b9fd5
commit 7cd1ca9a1f
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9
4a1s/MFES/PL - Aula 5.md
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@ -45,6 +45,13 @@ pred Invs {
//no node links to nodes associated with a different hash //no node links to nodes associated with a different hash
all x, y: Node | x.key.hash != y.key.hash implies (x.prox != y and y.prox != x) all x, y: Node | x.key.hash != y.key.hash implies (x.prox != y and y.prox != x)
//a node with the same hash as two others in the same hash cannot be prox of them two
all x, y, z:Node, w : Key | (x.key = w and y.key = w and z.key = w and x.prox = z) implies y.prox!=z
//MAY BE WORNG STUFF //MAY BE WORNG STUFF
@ -54,9 +61,11 @@ pred Invs {
//the prox node of another node may be empty //the prox node of another node may be empty
all x: Node, y : Node | x.prox = y or not x.prox = y all x: Node, y : Node | x.prox = y or not x.prox = y
//the sequence of nodes associated with the same hash should not loop
//all x : Node | x.prox.key != x.key //all x : Node | x.prox.key != x.key
//WORNG STUFF //WORNG STUFF
//buckets may only have one head exclusive to it //buckets may only have one head exclusive to it
all x, y : Bucket| all z : Node | x.head = z implies y.head != z all x, y : Bucket| all z : Node | x.head = z implies y.head != z