LOGIC SYMBOL

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12345678910111213
Across
  1. 1. – Symbol for the set of integers.
  2. 3. - At least one is true
  3. 5. - Denotes syntactic entailment; indicates that a statement can be derived from a set of axioms.
  4. 7. - Represents a statement that is always true.
  5. 9. – Set of elements belonging to at least one of two sets
  6. 10. - Represents a statement that is always false.
  7. 13. – Set of elements common to two sets.
Down
  1. 2. – Semantic entailment; a formula logically follows from another.
  2. 4. – Another notation for logical implication.
  3. 6. - It is not the case that
  4. 8. – Always true proposition.
  5. 10. - Both are true
  6. 11. - If the first is true, then the second is true. NATURALS – Symbol for the set of natural numbers.
  7. 12. - Used to denote a conclusion derived from premises.