Table B.1. Symbolic Notation
Symbol | Interpretation |
---|---|
{ } | brackets used to indicate a set |
= | assignment |
≡ | equivalence |
≢ | non-equivalence |
≅ | isomorphism |
∧ | conjunction (logical and) |
∨ | disjunction (logical or) |
¬ | negation (logical not) |
∃ | “there exists” |
∀ | “for every” , “for all” |
∪ | union |
∩ | intersection |
⊆ | subset |
⊇ | superset |
⊂ | proper subset |
⊃ | proper superset |
∈ | element operator |
Symbol | Interpretation |
---|---|
❍ | the full set: everything |
∅ | the null set: nothing |
∑ | sum: summation or collection |
∏ | product: intersection or dichotomy |
U | the physical universe |
O | the subjective universe |
V | the conceptual universe |
Ψ | perception |
Δ | communication |
Φ | conception |
ε | naming |