2430898
| Question | Answer |
| Reflexive | When every element of R is related to itself e.g. R1={(1, 1), (1, 2), (2, 2), (2, 3), (3, 3)} on the set {1, 2, 3} but not {1, 2, 3, 4, 5} |
| Symmetric | When (a, b) Є R and (b, a) Є R |
| Anti-Symmetric | When (a, b) Є R and (b, a) isn't Є R |
| Transitive | When (a, b), (b, c), (a, c) Є R |
| What is Domain, Codomain and Range? | |
| Injective | One-to-one relationship. Each mapping from A to B is unique and doesn't map onto an already mapped image |
| Surjective | Every element of b Є B has an a Є A such that f(a) = b Also when codomain = range |
| Bijective | Function which is injective and surjective. Basically one-to-one without any extra b's |
| Invertible | The inverse function that assigns b Є B to a Є A Only possible if function is bijective |
| Proposition | Declarative statement where it's either T or F, not both |
| Not Proposition | Questions & Instructions because cannot assign a Truth Value -Are you Bob? -Drive slow |
| Negation | Complement of set |
| Conjunction | Intersection of set (AND) |
| Disjunction | Union of set (OR) |
| Truth Table |
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